TY  - THES
AU  - Marković, Marija
PY  - 2022
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1017
AB  - Hemijskom modifikacijom zeolita površinski aktivnim supstancama kao što su dugolančani organski katjoni dobijaju se materijali sa hidrofobnijim površinama u odnosu na polazni zeolit koji imaju afinitet za adsorpciju slabo polarnih molekula. U ovoj doktorskoj disertaciji prirodni zeolit filipsit iz ležišta u okolini Napulja u Italiji modifikovan je površinski aktivnim supstancama cetilpiridinijum-hloridom i heksadeciltrimetilamonijum-bromidom. Dobijeni uzorci organo-filipsita su okarakterisani određivanjem specifične površine, infracrvenom spektroskopijom sa Furijeovom transformacijom (FTIC), simultanim termijskim analizama (TG/DTA), određivanjem zeta potencijala i određivanjem tačke nultog naelektrisanja. Polazni uzorak filipsita je pored ovih metoda okarakterisan i rendgensko difrakcionom (XRPD) analizom, skenirajućom elektronskom mikroskopijom sa energetski-disperzivnom rendgenskom analizom (SEM-EDS), određivanjem hemijskog sastava i određivanjem ukupnog i spoljašnjeg kapaciteta katjonske izmene. U zavisnosti od količine organskih katjona upotrebljenih za modifikaciju, na površini filipsita se formira monosloj ili dvosloj organske faze. Pri formiranju monosloja dolazi do jonske izmene neorganskih katjona na površini filipsita sa cetilpiridinijum i heksadeciltrimetilamonijum jonima, dok se pri formiranju dvosloja pored jonske izmene javljaju i hidrofobne interakcije između alkilnih lanaca organskih katjona. Pokazano je da modifikacijom nije došlo do promena osnovne strukture minerala i da su organski katjoni prisutni samo na površini filipsita. Organo-filipsiti su nakon karakterizacije ispitivani kao adsorbenti slabo polarnih organskih molekula i to: mikotoksina (zearalenon, ohratoksin A, aflatoksin B1) i lekovite supstance (natrijum diklofenak).
Zearalenon i ohratoksin A su se efikasno adsorbovali na organo-filipsitima u odnosu na polazni filipsit, koji je pokazao nisku adsorpciju ovih mikotoksina. Utvrđeno je da su organski katjoni na površini filipsita aktivna mesta na kojima se adsorbuju zearalenon i ohratoksin A, kao i da tip organskog katjona nema veći uticaj na adsorpciju ovih toksina. Za razliku od zearalenona čija je adsorpcija pH nezavisna, adsorpcija ohratoksina A zavisi od pH sredine. S obzirom da je u ispitivanjima adsorpcije mikotoksina najviše ispitivan prirodni zeolit klinoptilolit, rezultati adsorpcije na filipsitu modifikovanom cetilpiridinijum jonom su upoređeni sa rezultatima adsorpcije na klinoptilolitu modifikovanom istim organskim katjonom. Utvrđeno je da su organo-filipsiti jednako efikasni u adsorpciji zearalenona i ohratoksina A kao i organo-klinoptiloliti. Aflatoksin B1 se efikasno adsorbovao na organo-filipsitima kao i na polaznom filipsitu, što ukazuje da su adsorpcioni centri kod nemodifikovanog filipsita neorganski katjoni prisutni na površini minerala dok kod organo-filipsita organski katjoni stvaraju nove adsorpcione centre. Poredeći rezultate adsorpcije aflatoksina B1 na filipsitu i klinoptilolitu, viša adsorpcija je postignuta na klinoptilolitu, što ukazuje da na adsorpciju ovog toksina utiče i vrsta neorganskih katjona na površini zeolita a ne samo njihova količina. Međutim kada se uporedi adsorpcija aflatoksina B1 na zeolitima, filipsitu i klinoptilolitu, sa adsorpcijom na montmorilonitu uočava se znatno viša adsorpcija na montmorilonitu što je posledica razlike u strukturama ova dva minerala. Natrijum diklofenak se efikasno adsorbovao na organo-filipsitma, za razliku od polaznog filipsita koji praktično ne adsorbuje natrijum diklofenak. Za adsorpciju natrijum diklofenaka odgovorne su elektrostatičke interakcije anjonskog oblika natrijum diklofenaka i pozitivno naelektrisane „glave“ organskog katjona kao i hidrofobne interakcije između hidrofobnog dela natrijum diklofenaka i alkilnih lanaca organskih katjona. Karakterizacija organo-filipsita nakon adsorpcije natrijum diklofenaka je pokazala da su organo-filipsiti strukturno stabilni.
Organo-filipsiti dobijeni modifikacijom površine filipsita cetilpiridinijum i heksadeciltrimetilamonijum jonom su efikasni adsorbenti mikotoksina (zearalenon, ohratoksin A,
aflatoksin B1) i lekovite supstance (natrijum diklofenak) i mogli bi naći praktičnu primenu u ishrani životinja kao aditivi stočnoj hrani i u farmaciji kao nosači aktivne farmaceutske supstance.
AB  - Chemical modification of zeolite with surfactants such as long-chain organic cations yields materials with more hydrophobic surfaces than the starting zeolite that have an affinity for adsorption of low polar molecules. In this doctoral dissertation, natural zeolite phillipsite from a deposit near Naples in Italy was modified with surfactants: cetylpyridinium-chloride and hexadecyltrimethylammonium-bromide. The obtained organo-phillipsite samples were characterized by determination of specific surface area, Fourier transform infrared spectroscopy (FTIR), coupled thermal analysis methods (TG/DTA), determination of zeta potential and determination of the point of zero charge. In addition to these methods, the initial phillipsite sample was characterized by X-ray powder diffraction (XRPD) analysis, scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM-EDS), determination of chemical composition and determination of total and external cation exchange capacity. Depending on the amount of organic cations used for modification, a monolayer or bilayer of the organic phase is formed on the surface of the phillipsite. During the formation of the monolayer, ion exchange of inorganic cations on the surface of the phillipsite with cetylpyridinium and hexadecyltrimethylammonium ions occurs, while during the formation of the bilayer, hydrophobic interactions between the alkyl chains of organic cations occur in addition to the ion exchange. It has been shown that the modification did not change the basic structure of the mineral and that organic cations are present only on the surface of the phillipsite. After characterization, organo-philipsites were tested as adsorbents of low polar organic molecules: mycotoxins (zearalenone, ochratoxin A, aflatoxin B1) and drug (diclofenac sodium).
Zearalenone and ochratoxin A were efficiently adsorbed on organo-phillipsites compared to the initial phillipsite, which showed low adsorption of these mycotoxins. It was found that organic cations on the surface of philipsite are active sites where zearalenone and ochratoxin A are adsorbed, and that the type of organic cation has no major effect on the adsorption of these toxins. Unlike zearalenone, whose adsorption is pH independent, the adsorption of ochratoxin A depends on the pH of the medium. Since the natural zeolite clinoptilolite was the most investigated in mycotoxin adsorption studies, the results of adsorption on cetylpyridinium modified phillipsite were compared with the results of adsorption on clinoptilolite modified with the same organic cation. Organo-phillipsites were found to be as effective in the adsorption of zearalenone and ochratoxin A as organo-clinoptilolites. Aflatoxin B1 was efficiently adsorbed on organo-phillipsites as well as on the initial phillipsite, which indicates that adsorption centers in unmodified phillipsite are inorganic cations present on the mineral surface while in organo-phillipsites organic cations create new adsorption centers. Comparing the results of adsorption of aflatoxin B1 on phillipsite and clinoptilolite, higher adsorption was achieved on clinoptilolite, which indicates that the adsorption of this toxin is influenced by the type of inorganic cations on the surface of zeolite and not just their amount. However, when comparing the adsorption of aflatoxin B1 on zeolites, phillipsite and clinoptilolite, with the adsorption on montmorillonite, significantly higher adsorption on montmorillonite is observed due to the difference in the structures of these two minerals. Diclofenac sodium was efficiently adsorbed on organo-phillipsites, in contrast to the initial phillipsite, which practically does not adsorb diclofenac sodium. Electrostatic interactions of the anionic form of diclofenac sodium and the positively charged „head“ of the organic cation as well as the hydrophobic interactions between the hydrophobic part of the diclofenac sodium and the alkyl chains of organic cations are responsible for the adsorption of diclofenac sodium. Characterization of organo-phillipsites after adsorption of diclofenac sodium showed that organo-philipsites are structurally stable.
Organo-phillipsites obtained by modifying the surface of phillipsite with cetylpyridinium and hexadecyltrimethylammonium ion are effective adsorbents of mycotoxins (zearalenone, ochratoxin A, aflatoxin B1) and drug (diclofenac sodium) and could find practical application in animal nutrition as feed additives and in pharmacy as carriers of active pharmaceutical ingredient.
PB  - Beograd : Univerzitet u Beogradu, Fakultet za fizičku hemiju
T1  - Funkcionalizacija filipsita cetilpiridinijum-hloridom i heksadeciltrimetilamonijum-bromidom i njegova potencijalna primena
EP  - 92
SP  - 1
ER  - 

@phdthesis{
author = "Marković, Marija",
year = "2022",
abstract = "Hemijskom modifikacijom zeolita površinski aktivnim supstancama kao što su dugolančani organski katjoni dobijaju se materijali sa hidrofobnijim površinama u odnosu na polazni zeolit koji imaju afinitet za adsorpciju slabo polarnih molekula. U ovoj doktorskoj disertaciji prirodni zeolit filipsit iz ležišta u okolini Napulja u Italiji modifikovan je površinski aktivnim supstancama cetilpiridinijum-hloridom i heksadeciltrimetilamonijum-bromidom. Dobijeni uzorci organo-filipsita su okarakterisani određivanjem specifične površine, infracrvenom spektroskopijom sa Furijeovom transformacijom (FTIC), simultanim termijskim analizama (TG/DTA), određivanjem zeta potencijala i određivanjem tačke nultog naelektrisanja. Polazni uzorak filipsita je pored ovih metoda okarakterisan i rendgensko difrakcionom (XRPD) analizom, skenirajućom elektronskom mikroskopijom sa energetski-disperzivnom rendgenskom analizom (SEM-EDS), određivanjem hemijskog sastava i određivanjem ukupnog i spoljašnjeg kapaciteta katjonske izmene. U zavisnosti od količine organskih katjona upotrebljenih za modifikaciju, na površini filipsita se formira monosloj ili dvosloj organske faze. Pri formiranju monosloja dolazi do jonske izmene neorganskih katjona na površini filipsita sa cetilpiridinijum i heksadeciltrimetilamonijum jonima, dok se pri formiranju dvosloja pored jonske izmene javljaju i hidrofobne interakcije između alkilnih lanaca organskih katjona. Pokazano je da modifikacijom nije došlo do promena osnovne strukture minerala i da su organski katjoni prisutni samo na površini filipsita. Organo-filipsiti su nakon karakterizacije ispitivani kao adsorbenti slabo polarnih organskih molekula i to: mikotoksina (zearalenon, ohratoksin A, aflatoksin B1) i lekovite supstance (natrijum diklofenak).
Zearalenon i ohratoksin A su se efikasno adsorbovali na organo-filipsitima u odnosu na polazni filipsit, koji je pokazao nisku adsorpciju ovih mikotoksina. Utvrđeno je da su organski katjoni na površini filipsita aktivna mesta na kojima se adsorbuju zearalenon i ohratoksin A, kao i da tip organskog katjona nema veći uticaj na adsorpciju ovih toksina. Za razliku od zearalenona čija je adsorpcija pH nezavisna, adsorpcija ohratoksina A zavisi od pH sredine. S obzirom da je u ispitivanjima adsorpcije mikotoksina najviše ispitivan prirodni zeolit klinoptilolit, rezultati adsorpcije na filipsitu modifikovanom cetilpiridinijum jonom su upoređeni sa rezultatima adsorpcije na klinoptilolitu modifikovanom istim organskim katjonom. Utvrđeno je da su organo-filipsiti jednako efikasni u adsorpciji zearalenona i ohratoksina A kao i organo-klinoptiloliti. Aflatoksin B1 se efikasno adsorbovao na organo-filipsitima kao i na polaznom filipsitu, što ukazuje da su adsorpcioni centri kod nemodifikovanog filipsita neorganski katjoni prisutni na površini minerala dok kod organo-filipsita organski katjoni stvaraju nove adsorpcione centre. Poredeći rezultate adsorpcije aflatoksina B1 na filipsitu i klinoptilolitu, viša adsorpcija je postignuta na klinoptilolitu, što ukazuje da na adsorpciju ovog toksina utiče i vrsta neorganskih katjona na površini zeolita a ne samo njihova količina. Međutim kada se uporedi adsorpcija aflatoksina B1 na zeolitima, filipsitu i klinoptilolitu, sa adsorpcijom na montmorilonitu uočava se znatno viša adsorpcija na montmorilonitu što je posledica razlike u strukturama ova dva minerala. Natrijum diklofenak se efikasno adsorbovao na organo-filipsitma, za razliku od polaznog filipsita koji praktično ne adsorbuje natrijum diklofenak. Za adsorpciju natrijum diklofenaka odgovorne su elektrostatičke interakcije anjonskog oblika natrijum diklofenaka i pozitivno naelektrisane „glave“ organskog katjona kao i hidrofobne interakcije između hidrofobnog dela natrijum diklofenaka i alkilnih lanaca organskih katjona. Karakterizacija organo-filipsita nakon adsorpcije natrijum diklofenaka je pokazala da su organo-filipsiti strukturno stabilni.
Organo-filipsiti dobijeni modifikacijom površine filipsita cetilpiridinijum i heksadeciltrimetilamonijum jonom su efikasni adsorbenti mikotoksina (zearalenon, ohratoksin A,
aflatoksin B1) i lekovite supstance (natrijum diklofenak) i mogli bi naći praktičnu primenu u ishrani životinja kao aditivi stočnoj hrani i u farmaciji kao nosači aktivne farmaceutske supstance., Chemical modification of zeolite with surfactants such as long-chain organic cations yields materials with more hydrophobic surfaces than the starting zeolite that have an affinity for adsorption of low polar molecules. In this doctoral dissertation, natural zeolite phillipsite from a deposit near Naples in Italy was modified with surfactants: cetylpyridinium-chloride and hexadecyltrimethylammonium-bromide. The obtained organo-phillipsite samples were characterized by determination of specific surface area, Fourier transform infrared spectroscopy (FTIR), coupled thermal analysis methods (TG/DTA), determination of zeta potential and determination of the point of zero charge. In addition to these methods, the initial phillipsite sample was characterized by X-ray powder diffraction (XRPD) analysis, scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM-EDS), determination of chemical composition and determination of total and external cation exchange capacity. Depending on the amount of organic cations used for modification, a monolayer or bilayer of the organic phase is formed on the surface of the phillipsite. During the formation of the monolayer, ion exchange of inorganic cations on the surface of the phillipsite with cetylpyridinium and hexadecyltrimethylammonium ions occurs, while during the formation of the bilayer, hydrophobic interactions between the alkyl chains of organic cations occur in addition to the ion exchange. It has been shown that the modification did not change the basic structure of the mineral and that organic cations are present only on the surface of the phillipsite. After characterization, organo-philipsites were tested as adsorbents of low polar organic molecules: mycotoxins (zearalenone, ochratoxin A, aflatoxin B1) and drug (diclofenac sodium).
Zearalenone and ochratoxin A were efficiently adsorbed on organo-phillipsites compared to the initial phillipsite, which showed low adsorption of these mycotoxins. It was found that organic cations on the surface of philipsite are active sites where zearalenone and ochratoxin A are adsorbed, and that the type of organic cation has no major effect on the adsorption of these toxins. Unlike zearalenone, whose adsorption is pH independent, the adsorption of ochratoxin A depends on the pH of the medium. Since the natural zeolite clinoptilolite was the most investigated in mycotoxin adsorption studies, the results of adsorption on cetylpyridinium modified phillipsite were compared with the results of adsorption on clinoptilolite modified with the same organic cation. Organo-phillipsites were found to be as effective in the adsorption of zearalenone and ochratoxin A as organo-clinoptilolites. Aflatoxin B1 was efficiently adsorbed on organo-phillipsites as well as on the initial phillipsite, which indicates that adsorption centers in unmodified phillipsite are inorganic cations present on the mineral surface while in organo-phillipsites organic cations create new adsorption centers. Comparing the results of adsorption of aflatoxin B1 on phillipsite and clinoptilolite, higher adsorption was achieved on clinoptilolite, which indicates that the adsorption of this toxin is influenced by the type of inorganic cations on the surface of zeolite and not just their amount. However, when comparing the adsorption of aflatoxin B1 on zeolites, phillipsite and clinoptilolite, with the adsorption on montmorillonite, significantly higher adsorption on montmorillonite is observed due to the difference in the structures of these two minerals. Diclofenac sodium was efficiently adsorbed on organo-phillipsites, in contrast to the initial phillipsite, which practically does not adsorb diclofenac sodium. Electrostatic interactions of the anionic form of diclofenac sodium and the positively charged „head“ of the organic cation as well as the hydrophobic interactions between the hydrophobic part of the diclofenac sodium and the alkyl chains of organic cations are responsible for the adsorption of diclofenac sodium. Characterization of organo-phillipsites after adsorption of diclofenac sodium showed that organo-philipsites are structurally stable.
Organo-phillipsites obtained by modifying the surface of phillipsite with cetylpyridinium and hexadecyltrimethylammonium ion are effective adsorbents of mycotoxins (zearalenone, ochratoxin A, aflatoxin B1) and drug (diclofenac sodium) and could find practical application in animal nutrition as feed additives and in pharmacy as carriers of active pharmaceutical ingredient.",
publisher = "Beograd : Univerzitet u Beogradu, Fakultet za fizičku hemiju",
title = "Funkcionalizacija filipsita cetilpiridinijum-hloridom i heksadeciltrimetilamonijum-bromidom i njegova potencijalna primena",
pages = "92-1"
}

Marković, M.. (2022). Funkcionalizacija filipsita cetilpiridinijum-hloridom i heksadeciltrimetilamonijum-bromidom i njegova potencijalna primena. 
Beograd : Univerzitet u Beogradu, Fakultet za fizičku hemiju., 1-92.

Marković M. Funkcionalizacija filipsita cetilpiridinijum-hloridom i heksadeciltrimetilamonijum-bromidom i njegova potencijalna primena. 2022;:1-92..

Marković, Marija, "Funkcionalizacija filipsita cetilpiridinijum-hloridom i heksadeciltrimetilamonijum-bromidom i njegova potencijalna primena" (2022):1-92.

Radulović, D., Andrić, L., Petrov, M., Stojanović, J.,& Marković, B.. (2020). Tehnološka ispitivanja i naučno-stručna validacija rude iz ležišta „Kula“ u cilju proširenja eksploatacionog prostora i uvećanja rudnih rezervi Rudnika „Grot“-Kriva Feja (Vranje). 
Beograd : Institut za tehnologiju nuklearnih i drugih mineralnih sirovina..

Radulović D, Andrić L, Petrov M, Stojanović J, Marković B. Tehnološka ispitivanja i naučno-stručna validacija rude iz ležišta „Kula“ u cilju proširenja eksploatacionog prostora i uvećanja rudnih rezervi Rudnika „Grot“-Kriva Feja (Vranje). 2020;..

Radulović, Dragan, Andrić, Ljubiša, Petrov, Milan, Stojanović, Jovica, Marković, Branislav, "Tehnološka ispitivanja i naučno-stručna validacija rude iz ležišta „Kula“ u cilju proširenja eksploatacionog prostora i uvećanja rudnih rezervi Rudnika „Grot“-Kriva Feja (Vranje)" (2020).

TY  - THES
AU  - Koprivica, Marija
PY  - 2020
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=7663
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:22832/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=23747081
UR  - https://nardus.mpn.gov.rs/handle/123456789/17607
UR  - https://ritnms.itnms.ac.rs/handle/123456789/19
AB  - Istrazivanjima u okviru ove doktorske disertacije na osnovu sadrţaja pojedinih fitohemikalija izvršena je hemijska karakterizacija semena 25 sorti/genotipova breskve razliĉitog genetiĉkog i geografskog porekla gajenih pod istim klimatskim uslovima na teritoriji Srbije u okviru kolekcije oglednog dobra „Radmilovac‖ Poljoprivrednog fakulteta Univerziteta u Beogradu. U cilju utvrĊivanja sliĉnosti i razlika izmeĊu pojedinih genotipova breskve, kao i odreĊivanja potencijalnih biomarkera njihovog genetiĉkog i geografskog porekla, istraţivanja su obuhvatila analizu varijabilnosti standradnih sorti (poreklom iz SAD i Italije), perspektivnih hibrida (nastalih ukrštanjem standardnih sorti) i nekoliko genotipova vinogradarske breskve kao autohtone sorte iz Srbije. Osim podele po poreklu, ispitivani genotipovi breskve razlikovali su se i po vremenu sazrevanja ploda. Gasna hromatografija sa plameno-jonizacionim detektorom (Gas Chromatography with Flame Ionization Detector, GC-FID) korišćena je za odreĊivanje sastava masnih kiselina u uzorcima semena breskve. Bez obzira na razliĉitost izmeĊu genotipova, ulje semena breskve ima sliĉan sastav masnih kiselina koji se najvećim delom sastoji od nezasićenih masnih kiselina, oleinske i linolne kiseline. Razlika izmeĊu sorti/genotipova breskve se ogleda samo u razlici u procentualnim koncentracijama najzastupljenijih masnih kiselina. Ulje semena breskve ima nizak ukupni sadrţaj zasićenih masnih kiselina, manji od 15%, i to uglavnom sadrţi palmitinsku i stearinsku kiselinu. Fenolni profil semena breskve odreĊen je ultra-visokoefikasnom teĉnom hromatografijom spregnutom sa hibridnim masenim spektrometrom (Ultra High-Perfomance Liquid Chromatography coupled with a hybrid mass spectrometer - Linear Trap Quadrupole and OrbiTrap mass analyzer, UHPLC-LTQ OrbiTrap MS/MS). U uzorcima semena breskve detektovane su razliĉite klase fenolnih jedinjenja i nekoliko organskih kiselina sa manjim brojem C-atoma. Od fenolnih jedinjenja semena breskve u najvećoj koliĉini sadrţe katehin i šest fenolnih kiselina: protokatehuinsku, p-hidroksibenzoevu, p-hidroksifenilsirćetnu, hlorogenu, p-kumarinsku i ferulinsku kiselinu. Kvantifikacija saharida izvršena je upotrebom visoko-efikasne anjonske hromatografije sa elektrohemijskom detekcijom (High-Performance Anion Exchange Chromatography with Pulsed Amperometric Detection, HPAEC-PAD...
AB  - The investigations in scope of this doctoral dissertation were based on the content of a several phytochemicals and it comprised chemical characterization of kernels of 25 peach cultivars/genotypes differing in genetic and geographical origin cultivated under the same climatic conditions in the territory of Serbia within a collection of the „Radmilovac‖ Experimental Station of the University of Belgrade - Faculty of Agriculture. In order to determine the similarities and differences between the individual cultivars/genotypes of the peach, as well as to identify potential biomarkers of their genetic and geographical origin, the research included an analysis of the variability of standard cultivars (originating in the USA and Italy), promising hybrids (created by standard cultivars cross-breeding) and several vineyard peach genotypes as autochthonous cultivars from Serbia. Except from this division, the examined genotypes of the peach differed according to the ripening time. Gas chromatography with flame ionization detector (GC-FID) was used to determine the composition of fatty acids in samples of the peach kernels. Regardless of the difference between genotypes, the peach kernel oil has the similar fatty acid composition, which the most consists of unsaturated fatty acids, oleic and linoleic acids. Variation between varieties/genotypes of peach is only seen in the difference in the percentage concentrations of the most abundant fatty acids. The kernel oil has a low total saturated fatty acid content less than 15%, which is mainly composed of palmitic and stearic acids. The phenolic profile of peach kernels was determined by ultra-high-perfomance liquid chromatography coupled with a hybrid mass spectrometer (UHPLC-LTQ OrbiTrap MS/MS). In samples of peach kernels, different classes of phenolic substances and several organic acids with small number of C atoms were detected. Among phenolic compounds, the most abundant in peach seeds were catechin and six phenolic acids: protocatechuic, p-hydroxybenzoic, p-hydroxyphenylacetic, chlorogenic, p-coumaric and ferulic acids. The quantification of saccharides was perfomed using high-performance anion exchange chromatography with pulsed amperometric detection (HPAEC-PAD)...
PB  - Univerzitet u Beogradu, Hemijski fakultet
T1  - Hemijska karakterizacija semena breskve (Prunus persica L.)
T1  - The chemical characterization of peach kernels (Prunus persica L.)
UR  - https://hdl.handle.net/21.15107/rcub_nardus_17607
UR  - t-10724
ER  - 

@phdthesis{
author = "Koprivica, Marija",
year = "2020",
abstract = "Istrazivanjima u okviru ove doktorske disertacije na osnovu sadrţaja pojedinih fitohemikalija izvršena je hemijska karakterizacija semena 25 sorti/genotipova breskve razliĉitog genetiĉkog i geografskog porekla gajenih pod istim klimatskim uslovima na teritoriji Srbije u okviru kolekcije oglednog dobra „Radmilovac‖ Poljoprivrednog fakulteta Univerziteta u Beogradu. U cilju utvrĊivanja sliĉnosti i razlika izmeĊu pojedinih genotipova breskve, kao i odreĊivanja potencijalnih biomarkera njihovog genetiĉkog i geografskog porekla, istraţivanja su obuhvatila analizu varijabilnosti standradnih sorti (poreklom iz SAD i Italije), perspektivnih hibrida (nastalih ukrštanjem standardnih sorti) i nekoliko genotipova vinogradarske breskve kao autohtone sorte iz Srbije. Osim podele po poreklu, ispitivani genotipovi breskve razlikovali su se i po vremenu sazrevanja ploda. Gasna hromatografija sa plameno-jonizacionim detektorom (Gas Chromatography with Flame Ionization Detector, GC-FID) korišćena je za odreĊivanje sastava masnih kiselina u uzorcima semena breskve. Bez obzira na razliĉitost izmeĊu genotipova, ulje semena breskve ima sliĉan sastav masnih kiselina koji se najvećim delom sastoji od nezasićenih masnih kiselina, oleinske i linolne kiseline. Razlika izmeĊu sorti/genotipova breskve se ogleda samo u razlici u procentualnim koncentracijama najzastupljenijih masnih kiselina. Ulje semena breskve ima nizak ukupni sadrţaj zasićenih masnih kiselina, manji od 15%, i to uglavnom sadrţi palmitinsku i stearinsku kiselinu. Fenolni profil semena breskve odreĊen je ultra-visokoefikasnom teĉnom hromatografijom spregnutom sa hibridnim masenim spektrometrom (Ultra High-Perfomance Liquid Chromatography coupled with a hybrid mass spectrometer - Linear Trap Quadrupole and OrbiTrap mass analyzer, UHPLC-LTQ OrbiTrap MS/MS). U uzorcima semena breskve detektovane su razliĉite klase fenolnih jedinjenja i nekoliko organskih kiselina sa manjim brojem C-atoma. Od fenolnih jedinjenja semena breskve u najvećoj koliĉini sadrţe katehin i šest fenolnih kiselina: protokatehuinsku, p-hidroksibenzoevu, p-hidroksifenilsirćetnu, hlorogenu, p-kumarinsku i ferulinsku kiselinu. Kvantifikacija saharida izvršena je upotrebom visoko-efikasne anjonske hromatografije sa elektrohemijskom detekcijom (High-Performance Anion Exchange Chromatography with Pulsed Amperometric Detection, HPAEC-PAD..., The investigations in scope of this doctoral dissertation were based on the content of a several phytochemicals and it comprised chemical characterization of kernels of 25 peach cultivars/genotypes differing in genetic and geographical origin cultivated under the same climatic conditions in the territory of Serbia within a collection of the „Radmilovac‖ Experimental Station of the University of Belgrade - Faculty of Agriculture. In order to determine the similarities and differences between the individual cultivars/genotypes of the peach, as well as to identify potential biomarkers of their genetic and geographical origin, the research included an analysis of the variability of standard cultivars (originating in the USA and Italy), promising hybrids (created by standard cultivars cross-breeding) and several vineyard peach genotypes as autochthonous cultivars from Serbia. Except from this division, the examined genotypes of the peach differed according to the ripening time. Gas chromatography with flame ionization detector (GC-FID) was used to determine the composition of fatty acids in samples of the peach kernels. Regardless of the difference between genotypes, the peach kernel oil has the similar fatty acid composition, which the most consists of unsaturated fatty acids, oleic and linoleic acids. Variation between varieties/genotypes of peach is only seen in the difference in the percentage concentrations of the most abundant fatty acids. The kernel oil has a low total saturated fatty acid content less than 15%, which is mainly composed of palmitic and stearic acids. The phenolic profile of peach kernels was determined by ultra-high-perfomance liquid chromatography coupled with a hybrid mass spectrometer (UHPLC-LTQ OrbiTrap MS/MS). In samples of peach kernels, different classes of phenolic substances and several organic acids with small number of C atoms were detected. Among phenolic compounds, the most abundant in peach seeds were catechin and six phenolic acids: protocatechuic, p-hydroxybenzoic, p-hydroxyphenylacetic, chlorogenic, p-coumaric and ferulic acids. The quantification of saccharides was perfomed using high-performance anion exchange chromatography with pulsed amperometric detection (HPAEC-PAD)...",
publisher = "Univerzitet u Beogradu, Hemijski fakultet",
title = "Hemijska karakterizacija semena breskve (Prunus persica L.), The chemical characterization of peach kernels (Prunus persica L.)",
url = "https://hdl.handle.net/21.15107/rcub_nardus_17607, t-10724"
}

Koprivica, M.. (2020). Hemijska karakterizacija semena breskve (Prunus persica L.). 
Univerzitet u Beogradu, Hemijski fakultet..
https://hdl.handle.net/21.15107/rcub_nardus_17607

Koprivica M. Hemijska karakterizacija semena breskve (Prunus persica L.). 2020;.
https://hdl.handle.net/21.15107/rcub_nardus_17607 .

Koprivica, Marija, "Hemijska karakterizacija semena breskve (Prunus persica L.)" (2020),
https://hdl.handle.net/21.15107/rcub_nardus_17607 .

TY  - CONF
AU  - Daković, Aleksandra
AU  - Spasojević, Milica
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/741
AB  - The natural kaolin from a plant for the production of quartz sand in Rgotina, Serbia (KR) was modified with two cationic surfactants - octadecyl dimethyl benzyl ammonium chloride (O) and hexadecyltrimethylammonium bromide (H). Both surfactants were added in amounts equal to 90% of kaolin cation exchange capacity (CEC). The obtained materials were denoted as OKR and HKR. Characterizations of KR, OKR, and HKR were done by Fourier transform infrared spectroscopy (FTIR) spectroscopy and zeta potential measurements. FTIR spectra and zeta potential measurements confirmed the presence of both surfactants at the kaolin surface. 
Adsorption of mycotoxins – zearalenone (ZEN) and ochratoxin A (OCHRA) was studied by the natural kaolin and organokaolines under in vitro conditions. The effects of the amount of the adsorbent, the initial ZEN and OCHRA concentrations, and pH, on adsorption of mycotoxins, were investigated. Preliminary results of adsorption of ZEN and OCHRA by KR showed that natural kaolin had no affinity to adsorb these mycotoxins. However, the presence of both organic cations in the kaolin structure significantly increased adsorption of ZEN and OCHRA. Adsorption of the mycotoxins by OKR and HKR increased with increasing the amount of each adsorbent in suspension. Slightly higher adsorption of ZEN than OCHRA by both adsorbents was observed at both pHs. 
ZEN and OCHRA adsorption increased for both OKR and HKR as the concentration of the initial toxins increased at pH 3 and 7. OCHRA and ZEN are hydrophobic molecules that possess different functional groups and may exist in various forms at different pH values. OCHRA adsorption by OKR and HKR followed nonlinear isotherms at pH 3 and 7, and higher adsorption capacity was obtained for OKR. Also, OCHRA adsorption capacity for OKR and HKR was much higher at pH 3. The obtained results suggest that adsorption of OCHRA was dependent on the form of OCHRA in solution and that type of surfactant had an influence on OCHRA adsorption. Adsorption of ZEN by organokaolines also showed nonlinear isotherms at pH 3 and 7 and similar amounts were adsorbed at both adsorbents at both pH values. The obtained adsorption capacities suggest that adsorption of ZEN was practically independent of the form of the toxin in solution and also on the type of the organic cations in the kaolin structure. Based on the obtained results, kaolin modified with surfactants may be effective materials for adsorption of ZEN and OCHRA.
PB  - Belgrade : Association of Metallurgical Engineers of Serbia
C3  - Metallurgical & Materials Engineering Congress of South-East Europe
T1  - Cationic surfactants modified kaolin – Efficient adsorbents for mycotoxins
EP  - 12
SP  - 12
ER  - 

@conference{
author = "Daković, Aleksandra and Spasojević, Milica",
year = "2019",
abstract = "The natural kaolin from a plant for the production of quartz sand in Rgotina, Serbia (KR) was modified with two cationic surfactants - octadecyl dimethyl benzyl ammonium chloride (O) and hexadecyltrimethylammonium bromide (H). Both surfactants were added in amounts equal to 90% of kaolin cation exchange capacity (CEC). The obtained materials were denoted as OKR and HKR. Characterizations of KR, OKR, and HKR were done by Fourier transform infrared spectroscopy (FTIR) spectroscopy and zeta potential measurements. FTIR spectra and zeta potential measurements confirmed the presence of both surfactants at the kaolin surface. 
Adsorption of mycotoxins – zearalenone (ZEN) and ochratoxin A (OCHRA) was studied by the natural kaolin and organokaolines under in vitro conditions. The effects of the amount of the adsorbent, the initial ZEN and OCHRA concentrations, and pH, on adsorption of mycotoxins, were investigated. Preliminary results of adsorption of ZEN and OCHRA by KR showed that natural kaolin had no affinity to adsorb these mycotoxins. However, the presence of both organic cations in the kaolin structure significantly increased adsorption of ZEN and OCHRA. Adsorption of the mycotoxins by OKR and HKR increased with increasing the amount of each adsorbent in suspension. Slightly higher adsorption of ZEN than OCHRA by both adsorbents was observed at both pHs. 
ZEN and OCHRA adsorption increased for both OKR and HKR as the concentration of the initial toxins increased at pH 3 and 7. OCHRA and ZEN are hydrophobic molecules that possess different functional groups and may exist in various forms at different pH values. OCHRA adsorption by OKR and HKR followed nonlinear isotherms at pH 3 and 7, and higher adsorption capacity was obtained for OKR. Also, OCHRA adsorption capacity for OKR and HKR was much higher at pH 3. The obtained results suggest that adsorption of OCHRA was dependent on the form of OCHRA in solution and that type of surfactant had an influence on OCHRA adsorption. Adsorption of ZEN by organokaolines also showed nonlinear isotherms at pH 3 and 7 and similar amounts were adsorbed at both adsorbents at both pH values. The obtained adsorption capacities suggest that adsorption of ZEN was practically independent of the form of the toxin in solution and also on the type of the organic cations in the kaolin structure. Based on the obtained results, kaolin modified with surfactants may be effective materials for adsorption of ZEN and OCHRA.",
publisher = "Belgrade : Association of Metallurgical Engineers of Serbia",
journal = "Metallurgical & Materials Engineering Congress of South-East Europe",
title = "Cationic surfactants modified kaolin – Efficient adsorbents for mycotoxins",
pages = "12-12"
}

Daković, A.,& Spasojević, M.. (2019). Cationic surfactants modified kaolin – Efficient adsorbents for mycotoxins. in Metallurgical & Materials Engineering Congress of South-East Europe
Belgrade : Association of Metallurgical Engineers of Serbia., 12-12.

Daković A, Spasojević M. Cationic surfactants modified kaolin – Efficient adsorbents for mycotoxins. in Metallurgical & Materials Engineering Congress of South-East Europe. 2019;:12-12..

Daković, Aleksandra, Spasojević, Milica, "Cationic surfactants modified kaolin – Efficient adsorbents for mycotoxins" in Metallurgical & Materials Engineering Congress of South-East Europe (2019):12-12.

TY  - CONF
AU  - Spasojević, Milica
AU  - Daković, Aleksandra
AU  - Rottinghaus, George E.
AU  - Obradović, Milena
AU  - Krajišnik, Danina
AU  - Mercurio, Mariano
AU  - Smiljanić, Danijela
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/739
AB  - Zeolite – phillipsite was modified with long chain organic surfactant – hexadecyltrimethyl-ammonium bromide (HB). Two different amounts of HB were used to modify the zeolitic surface (150 % and 200% of phillisite external exchange capacity - ECEC). Adsorption of non-steroidal antiinflam matory drug – ibuprofen (IBU) was studied at pH 7, at different initial drug concentrations. Adsorption increased with increasing the initial drug concentrations as well as with increasing amounts of organic phase at the phillipsite surface. From the Langmuir model, the maximum IBU adsorption capacity for phillipsite modified with surfactant at 150 % of ECEC was 12.72 mg/g, while for organophillipsite containing surfactant in amount of 200 % of ECEC, the maximum adsorption capacity was 18.25 mg/g.
PB  - Serbian Zeolite Association
C3  - 8th Serbian-Croatian-Slovenian Symposium on Zeolites
T1  - Organophillipsite as potential low cost adsorbent for removal of ibuprofen
EP  - 125
SP  - 122
ER  - 

@conference{
author = "Spasojević, Milica and Daković, Aleksandra and Rottinghaus, George E. and Obradović, Milena and Krajišnik, Danina and Mercurio, Mariano and Smiljanić, Danijela",
year = "2019",
abstract = "Zeolite – phillipsite was modified with long chain organic surfactant – hexadecyltrimethyl-ammonium bromide (HB). Two different amounts of HB were used to modify the zeolitic surface (150 % and 200% of phillisite external exchange capacity - ECEC). Adsorption of non-steroidal antiinflam matory drug – ibuprofen (IBU) was studied at pH 7, at different initial drug concentrations. Adsorption increased with increasing the initial drug concentrations as well as with increasing amounts of organic phase at the phillipsite surface. From the Langmuir model, the maximum IBU adsorption capacity for phillipsite modified with surfactant at 150 % of ECEC was 12.72 mg/g, while for organophillipsite containing surfactant in amount of 200 % of ECEC, the maximum adsorption capacity was 18.25 mg/g.",
publisher = "Serbian Zeolite Association",
journal = "8th Serbian-Croatian-Slovenian Symposium on Zeolites",
title = "Organophillipsite as potential low cost adsorbent for removal of ibuprofen",
pages = "125-122"
}

Spasojević, M., Daković, A., Rottinghaus, G. E., Obradović, M., Krajišnik, D., Mercurio, M.,& Smiljanić, D.. (2019). Organophillipsite as potential low cost adsorbent for removal of ibuprofen. in 8th Serbian-Croatian-Slovenian Symposium on Zeolites
Serbian Zeolite Association., 122-125.

Spasojević M, Daković A, Rottinghaus GE, Obradović M, Krajišnik D, Mercurio M, Smiljanić D. Organophillipsite as potential low cost adsorbent for removal of ibuprofen. in 8th Serbian-Croatian-Slovenian Symposium on Zeolites. 2019;:122-125..

Spasojević, Milica, Daković, Aleksandra, Rottinghaus, George E., Obradović, Milena, Krajišnik, Danina, Mercurio, Mariano, Smiljanić, Danijela, "Organophillipsite as potential low cost adsorbent for removal of ibuprofen" in 8th Serbian-Croatian-Slovenian Symposium on Zeolites (2019):122-125.

TY  - CONF
AU  - Obradović, Milena
AU  - Daković, Aleksandra
AU  - Rottinghaus, George E.
AU  - Spasojević, Milica
AU  - Marković, Marija
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/737
AB  - The contamination of the natural aquatic environment by pharmaceuticals is a serious environmental problem due to their extensive use in human health and animal husbandry. One of the most efficient technique for removal of pharmaceuticals from water is their adsorption on activated carbons, clays and zeolites. In this study adsorption of ketoprofen (KETO), widely used non-steroidal anti-inflammatory drug, on modified kaolin was invesitgated. The natural kaolin (from Rgotina, Serbia) was modified with cationic surfactant hexadecyltrimethyl ammonium bromide in amounts equivalent to 50% and 90% of kaolin cationic exchange capacity. FTIR and DTA/TGA were used for characterisation of materials. The obtained data showed that adsorption of KETO by modified kaolin increased with increasing the amount of surfactant, as well as with increasing the amount of solid phase in the suspension (0.5 – 5.0 mg/ml). According to obtained results modified kaolin may be used as adsobent for removal of KETO from contaminated water.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Eighteenth Young Researchers’ Conference Materials Science and Engineering
T1  - Kaolin modified with cationic surfactant as a potential adsorbent for ketoprofen
EP  - 85
SP  - 85
ER  - 

@conference{
author = "Obradović, Milena and Daković, Aleksandra and Rottinghaus, George E. and Spasojević, Milica and Marković, Marija",
year = "2019",
abstract = "The contamination of the natural aquatic environment by pharmaceuticals is a serious environmental problem due to their extensive use in human health and animal husbandry. One of the most efficient technique for removal of pharmaceuticals from water is their adsorption on activated carbons, clays and zeolites. In this study adsorption of ketoprofen (KETO), widely used non-steroidal anti-inflammatory drug, on modified kaolin was invesitgated. The natural kaolin (from Rgotina, Serbia) was modified with cationic surfactant hexadecyltrimethyl ammonium bromide in amounts equivalent to 50% and 90% of kaolin cationic exchange capacity. FTIR and DTA/TGA were used for characterisation of materials. The obtained data showed that adsorption of KETO by modified kaolin increased with increasing the amount of surfactant, as well as with increasing the amount of solid phase in the suspension (0.5 – 5.0 mg/ml). According to obtained results modified kaolin may be used as adsobent for removal of KETO from contaminated water.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Eighteenth Young Researchers’ Conference Materials Science and Engineering",
title = "Kaolin modified with cationic surfactant as a potential adsorbent for ketoprofen",
pages = "85-85"
}

Obradović, M., Daković, A., Rottinghaus, G. E., Spasojević, M.,& Marković, M.. (2019). Kaolin modified with cationic surfactant as a potential adsorbent for ketoprofen. in Eighteenth Young Researchers’ Conference Materials Science and Engineering
Belgrade : Institute of Technical Sciences of SASA., 85-85.

Obradović M, Daković A, Rottinghaus GE, Spasojević M, Marković M. Kaolin modified with cationic surfactant as a potential adsorbent for ketoprofen. in Eighteenth Young Researchers’ Conference Materials Science and Engineering. 2019;:85-85..

Obradović, Milena, Daković, Aleksandra, Rottinghaus, George E., Spasojević, Milica, Marković, Marija, "Kaolin modified with cationic surfactant as a potential adsorbent for ketoprofen" in Eighteenth Young Researchers’ Conference Materials Science and Engineering (2019):85-85.

TY  - CONF
AU  - Spasojević, Milica
AU  - Daković, Aleksandra
AU  - Obradović, Milena
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/734
AB  - Mycotoxins are secondary metabolites produced by fungal species [1]. Zearalenone (ZEN) is estrogenic mycotoxin, produced by Fusarium species, commonly found on different cereal crops [2]. This mycotoxin causes reproductive disorders in animals. Addition of adsorbents is the most economical approach to decontaminate animal feed contaminated with mycotoxins. Commonly used mineral adsorbents for this purpose are zeolites and bentonite. In their natural forms, they can bind only aflatoxins [3]. For adsorption of other mycotoxins, chemical modification is needed. In this study, the kaolin from a plant for production of quartz sand in Rgotina is investigated as potential adsorbent for ZEN. Preliminary experiments confirmed that the natural kaolin has no affinity to adsorb this toxin. Thus, organokaolins were prepared by treatment of the natural mineral with three different levels of octadecyldimethylbenzyl ammonium (ODMBA) ions equivalent to 25, 50 and 90% of kaolin cation exchange capacity (CEC). Adsorption of ZEN on organokaolins was followed at pH 3 under in vitro conditions by using high performance liquid chromatography (HPLC). The effects of amounts of surfactant used to prepare organokaolins and adsorbent mass (5.0 - 0.5 mg/mL) on adsorption of ZEN was investigated with the initial concentration of ZEN at 2 mg/L. Results indicated that ZEN adsorption increased with increasing amounts of surfactant on the kaolin and with increasing the amount adsorbent in suspension. Based on the obtained results, adsorption of ZEN is related to the increasing number and availability of adsorption sites at organokaolinic surface.
PB  - Bor : University of Belgrade, Technical Faculty in Bor
C3  - 6th International Students Conference on Techincal Sciences
T1  - Adsorption of zearalenone by organokaolins
EP  - 7
SP  - 7
ER  - 

@conference{
author = "Spasojević, Milica and Daković, Aleksandra and Obradović, Milena",
year = "2019",
abstract = "Mycotoxins are secondary metabolites produced by fungal species [1]. Zearalenone (ZEN) is estrogenic mycotoxin, produced by Fusarium species, commonly found on different cereal crops [2]. This mycotoxin causes reproductive disorders in animals. Addition of adsorbents is the most economical approach to decontaminate animal feed contaminated with mycotoxins. Commonly used mineral adsorbents for this purpose are zeolites and bentonite. In their natural forms, they can bind only aflatoxins [3]. For adsorption of other mycotoxins, chemical modification is needed. In this study, the kaolin from a plant for production of quartz sand in Rgotina is investigated as potential adsorbent for ZEN. Preliminary experiments confirmed that the natural kaolin has no affinity to adsorb this toxin. Thus, organokaolins were prepared by treatment of the natural mineral with three different levels of octadecyldimethylbenzyl ammonium (ODMBA) ions equivalent to 25, 50 and 90% of kaolin cation exchange capacity (CEC). Adsorption of ZEN on organokaolins was followed at pH 3 under in vitro conditions by using high performance liquid chromatography (HPLC). The effects of amounts of surfactant used to prepare organokaolins and adsorbent mass (5.0 - 0.5 mg/mL) on adsorption of ZEN was investigated with the initial concentration of ZEN at 2 mg/L. Results indicated that ZEN adsorption increased with increasing amounts of surfactant on the kaolin and with increasing the amount adsorbent in suspension. Based on the obtained results, adsorption of ZEN is related to the increasing number and availability of adsorption sites at organokaolinic surface.",
publisher = "Bor : University of Belgrade, Technical Faculty in Bor",
journal = "6th International Students Conference on Techincal Sciences",
title = "Adsorption of zearalenone by organokaolins",
pages = "7-7"
}

Spasojević, M., Daković, A.,& Obradović, M.. (2019). Adsorption of zearalenone by organokaolins. in 6th International Students Conference on Techincal Sciences
Bor : University of Belgrade, Technical Faculty in Bor., 7-7.

Spasojević M, Daković A, Obradović M. Adsorption of zearalenone by organokaolins. in 6th International Students Conference on Techincal Sciences. 2019;:7-7..

Spasojević, Milica, Daković, Aleksandra, Obradović, Milena, "Adsorption of zearalenone by organokaolins" in 6th International Students Conference on Techincal Sciences (2019):7-7.

TY  - CONF
AU  - Mihajlović, Slavica
AU  - Sekulić, Živko
AU  - Blagojev, Marina
AU  - Kašić, Vladan
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/668
AB  - To use quartz sand for water glass production, processing of raw quartz
sand is necessary. The objectives of processing are: achieving the required
granulometric composition, increasing the content of SiO2 and reducing the content
of impurities that lower its quality. The most frequently used method is the attrition
cleaning in combination with gravity and magnetic concentration. In order to
eliminate quartz sand impurities to a greater extent, it is approached to different
methods of preparing mineral raw materials, which depends of the content and
type of impurities as well as on the way they appear (as individual grains, surface
coatings on quartz grains or as a form of intergrowth with quartz). The size
reduction processes are used when it comes to sandstone or large-grained sand,
whereby the size decreases up to 0.6 mm. Besides that, washing, attrition
scrubbing, grading and also gravity, flotation, and magnetic concentration are
used. Desliming, washing, and grading procedures are used almost always
because there is clay present in the quartz raw material as impurities. The
scrubbing procedure in attrition machines is used when the quartz surface is
kaolinized and limonitised. The flotation concentration is used when in raw material
beside the quartz, there is mica and feldspar, with preceding washing and grading
procedures to eliminate the clay component. That is so-called „reverse“ flotation
consisting of flotating mica and feldspar is applied, and the pure quartz remains in
the pulp. The magnetic separation process is used when in quartz raw material are
also magnetic impurities type Fe2O3 as carriers of total iron. Efficacy of the removal
of iron is expressed as a rate of reduction of Fe2O3. In the company „Kesogradnja
d.o.o.“ at Kozluk, near Zvornik (Republic of Srpska) from quartz sand deposit
„Bijela Stijena Skočić“, quartz sand for the production of water glass was obtained
by the procedures of washing, grinding, sizing and magnetic separation.
PB  - Belgrade : Association of Metallurgical Engineers of Serbia
C3  - 4th Metallurgical & Materials Engineering Congress of South-East Europe 2019 - MMESEE 2019
T1  - Quartz sand processing methods for the application in water glass production
EP  - 49
SP  - 49
ER  - 

@conference{
author = "Mihajlović, Slavica and Sekulić, Živko and Blagojev, Marina and Kašić, Vladan",
year = "2019",
abstract = "To use quartz sand for water glass production, processing of raw quartz
sand is necessary. The objectives of processing are: achieving the required
granulometric composition, increasing the content of SiO2 and reducing the content
of impurities that lower its quality. The most frequently used method is the attrition
cleaning in combination with gravity and magnetic concentration. In order to
eliminate quartz sand impurities to a greater extent, it is approached to different
methods of preparing mineral raw materials, which depends of the content and
type of impurities as well as on the way they appear (as individual grains, surface
coatings on quartz grains or as a form of intergrowth with quartz). The size
reduction processes are used when it comes to sandstone or large-grained sand,
whereby the size decreases up to 0.6 mm. Besides that, washing, attrition
scrubbing, grading and also gravity, flotation, and magnetic concentration are
used. Desliming, washing, and grading procedures are used almost always
because there is clay present in the quartz raw material as impurities. The
scrubbing procedure in attrition machines is used when the quartz surface is
kaolinized and limonitised. The flotation concentration is used when in raw material
beside the quartz, there is mica and feldspar, with preceding washing and grading
procedures to eliminate the clay component. That is so-called „reverse“ flotation
consisting of flotating mica and feldspar is applied, and the pure quartz remains in
the pulp. The magnetic separation process is used when in quartz raw material are
also magnetic impurities type Fe2O3 as carriers of total iron. Efficacy of the removal
of iron is expressed as a rate of reduction of Fe2O3. In the company „Kesogradnja
d.o.o.“ at Kozluk, near Zvornik (Republic of Srpska) from quartz sand deposit
„Bijela Stijena Skočić“, quartz sand for the production of water glass was obtained
by the procedures of washing, grinding, sizing and magnetic separation.",
publisher = "Belgrade : Association of Metallurgical Engineers of Serbia",
journal = "4th Metallurgical & Materials Engineering Congress of South-East Europe 2019 - MMESEE 2019",
title = "Quartz sand processing methods for the application in water glass production",
pages = "49-49"
}

Mihajlović, S., Sekulić, Ž., Blagojev, M.,& Kašić, V.. (2019). Quartz sand processing methods for the application in water glass production. in 4th Metallurgical & Materials Engineering Congress of South-East Europe 2019 - MMESEE 2019
Belgrade : Association of Metallurgical Engineers of Serbia., 49-49.

Mihajlović S, Sekulić Ž, Blagojev M, Kašić V. Quartz sand processing methods for the application in water glass production. in 4th Metallurgical & Materials Engineering Congress of South-East Europe 2019 - MMESEE 2019. 2019;:49-49..

Mihajlović, Slavica, Sekulić, Živko, Blagojev, Marina, Kašić, Vladan, "Quartz sand processing methods for the application in water glass production" in 4th Metallurgical & Materials Engineering Congress of South-East Europe 2019 - MMESEE 2019 (2019):49-49.

TY  - CONF
AU  - Stojanović, Jovica
AU  - Pačevski, Aleksandar M.
AU  - Radosavljević-Mihajlović, Ana
AU  - Kašić, Vladan
AU  - Radosavljević, Slobodan
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/684
AB  - The Cerovo-Cementacija 2 porphyry Cu deposit, hosted by hydrothermally altered hornblende andesite,
located into the Bor Metallogenic Zone, eastern Serbia, has been investigated. In this porphyry Cu
deposit, the following mineral parageneses have been established: i) pyrite-chalcopyrite with Mo; ii)
quartz-pyrite with Au; iii) digenite-chalcocite-covellite with Au; iv) chalcedony by sulfatization and
sulphation; v) malachite-azurite-limonite. Chalcopyrite is the major Cu mineral and it is the most
abundant compared to other established Cu-sulfide minerals. By the ascending and descending
hydrothermal processes along the Zone-1 (cementation zone), chalcopyrite was commonly transformed
into secondary Cu sulfide minerals (digenite, chalcocite, anilite, covellite, etc.), while those appearances
is less represented to the Zone-2 (transitional zone).
PB  - Bor : University of Belgrade, Technical Faculty in Bor
C3  - The 51st International October Conference on Mining and Metallurgy
T1  - The Cerovo-cementacija 2 porphyry Cu deposit, Eastern Serbia - Ore mineralogy and paragenetic analysis
EP  - 211
SP  - 207
ER  - 

@conference{
author = "Stojanović, Jovica and Pačevski, Aleksandar M. and Radosavljević-Mihajlović, Ana and Kašić, Vladan and Radosavljević, Slobodan",
year = "2019",
abstract = "The Cerovo-Cementacija 2 porphyry Cu deposit, hosted by hydrothermally altered hornblende andesite,
located into the Bor Metallogenic Zone, eastern Serbia, has been investigated. In this porphyry Cu
deposit, the following mineral parageneses have been established: i) pyrite-chalcopyrite with Mo; ii)
quartz-pyrite with Au; iii) digenite-chalcocite-covellite with Au; iv) chalcedony by sulfatization and
sulphation; v) malachite-azurite-limonite. Chalcopyrite is the major Cu mineral and it is the most
abundant compared to other established Cu-sulfide minerals. By the ascending and descending
hydrothermal processes along the Zone-1 (cementation zone), chalcopyrite was commonly transformed
into secondary Cu sulfide minerals (digenite, chalcocite, anilite, covellite, etc.), while those appearances
is less represented to the Zone-2 (transitional zone).",
publisher = "Bor : University of Belgrade, Technical Faculty in Bor",
journal = "The 51st International October Conference on Mining and Metallurgy",
title = "The Cerovo-cementacija 2 porphyry Cu deposit, Eastern Serbia - Ore mineralogy and paragenetic analysis",
pages = "211-207"
}

Stojanović, J., Pačevski, A. M., Radosavljević-Mihajlović, A., Kašić, V.,& Radosavljević, S.. (2019). The Cerovo-cementacija 2 porphyry Cu deposit, Eastern Serbia - Ore mineralogy and paragenetic analysis. in The 51st International October Conference on Mining and Metallurgy
Bor : University of Belgrade, Technical Faculty in Bor., 207-211.

Stojanović J, Pačevski AM, Radosavljević-Mihajlović A, Kašić V, Radosavljević S. The Cerovo-cementacija 2 porphyry Cu deposit, Eastern Serbia - Ore mineralogy and paragenetic analysis. in The 51st International October Conference on Mining and Metallurgy. 2019;:207-211..

Stojanović, Jovica, Pačevski, Aleksandar M., Radosavljević-Mihajlović, Ana, Kašić, Vladan, Radosavljević, Slobodan, "The Cerovo-cementacija 2 porphyry Cu deposit, Eastern Serbia - Ore mineralogy and paragenetic analysis" in The 51st International October Conference on Mining and Metallurgy (2019):207-211.

TY  - CONF
AU  - Kašić, Vladan
AU  - Radosavljević-Mihajlović, Ana
AU  - Stojanović, Jovica
AU  - Mihajlović, Slavica
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/682
AB  - Since about 50 years it is known that giant deposits of natural zeolites of pyroclastic origin are spread over all Miocene sediments of Serbia. Such rocks have often zeolite contents between 60 and 90%. The most significant Serbian deposits of natural zeolites are: Zlatokop, Igros, Beocin, Toponica, and Slanci. Based on obtained results of structural, chemical, physical, and thermal analyses, the investigated zeolite tuffs can be generally defined in two mineral series: clinoptilolite-Ca, and heulandite-Ca. The interest for these materials is in steady mass growth as they are of vital importance for Serbian economy. The oversights of perennial mineralogical research of Serbian giant deposits of natural zeolites were presented in this paper.
PB  - Bor : University of Belgrade, Technical Faculty in Bor
C3  - 51st International October Conference on Mining and Metallurgy
T1  - Geology characteristics of zeolitic tuffes of Serbia
EP  - 194
SP  - 191
ER  - 

@conference{
author = "Kašić, Vladan and Radosavljević-Mihajlović, Ana and Stojanović, Jovica and Mihajlović, Slavica",
year = "2019",
abstract = "Since about 50 years it is known that giant deposits of natural zeolites of pyroclastic origin are spread over all Miocene sediments of Serbia. Such rocks have often zeolite contents between 60 and 90%. The most significant Serbian deposits of natural zeolites are: Zlatokop, Igros, Beocin, Toponica, and Slanci. Based on obtained results of structural, chemical, physical, and thermal analyses, the investigated zeolite tuffs can be generally defined in two mineral series: clinoptilolite-Ca, and heulandite-Ca. The interest for these materials is in steady mass growth as they are of vital importance for Serbian economy. The oversights of perennial mineralogical research of Serbian giant deposits of natural zeolites were presented in this paper.",
publisher = "Bor : University of Belgrade, Technical Faculty in Bor",
journal = "51st International October Conference on Mining and Metallurgy",
title = "Geology characteristics of zeolitic tuffes of Serbia",
pages = "194-191"
}

Kašić, V., Radosavljević-Mihajlović, A., Stojanović, J.,& Mihajlović, S.. (2019). Geology characteristics of zeolitic tuffes of Serbia. in 51st International October Conference on Mining and Metallurgy
Bor : University of Belgrade, Technical Faculty in Bor., 191-194.

Kašić V, Radosavljević-Mihajlović A, Stojanović J, Mihajlović S. Geology characteristics of zeolitic tuffes of Serbia. in 51st International October Conference on Mining and Metallurgy. 2019;:191-194..

Kašić, Vladan, Radosavljević-Mihajlović, Ana, Stojanović, Jovica, Mihajlović, Slavica, "Geology characteristics of zeolitic tuffes of Serbia" in 51st International October Conference on Mining and Metallurgy (2019):191-194.

TY  - CONF
AU  - Mihajlović, Slavica
AU  - Blagojev, Marina
AU  - Sekulić, Živko
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/688
AB  - Zaštita životne sredine je izuzetno važana u svim zemljama i u direktnoj je vezi sa stepenom
ekonomskog razvoja i nivoa edukacije stanovništa o značaju zdrave životne sredine i načinu njenog
očuvanja. Ubrzani tehnološki razvoj dovodi do poboljšanja kvaliteta života u svim sferama ljudske
aktivnosti, ali paralelno sa tim stvara se mogućnost veće degradacije životne sredine. Zbog toga je
važno analizirati negativan uticaj svih primenjenih tehničko-tehnoloških procesa kao i elemente
kontrolisanog korišćenje prirodnih resursa i energije, kako bi se na vreme usvojila strategija i
definisale aktivnosti u cilju sprovođenja adekvatnih mera zaštite životne sredine. Jedan od od velikih
problema u zaštiti životne sredine je pojava emisije gasova sa efektom staklene bašte. Svetske
organizacije koje se bave zaštitom životne sredine pružaju veliki podsticaj za razvoj i stvaranje boljih,
inovativnijih održivih rešenja u građevinarstvu. Tako je jedan od prioriteta proizvođača cementa
pronalaženje novih načina za daljim smanjenjem potrošnje energije i emisije CO2 koja je najveća u
fazi proizvodnje klinkera (proizvod procesa pečenja cementa prilikom spravljanja portland cementa).
Tako neprekidno nastaju nova rešenja koja smanjuju količinu klinkera dok u isto vreme potenciraju
upotrebu alternativnih materijala. Materijali koji mogu zameniti upotrebu cementa (supplementary
cementitious materials- SCM), kao i mešavine cementa nude prednosti u boljim karakteristikama i
održivosti za one koji grade i one koji koriste građevine svih vrsta. Prednosti su, ne samo u
dugotrajnijem betonu boljeg kvaliteta, već i u manjoj potrošnji energije i emisije gasova sa efektom
staklene bašte.
PB  - Beograd : Institut za tehnologiju nuklearnih i drugih mineralnih sirovina
C3  - X Simpozijum sa međunarodnim učešćem „Rudarstvo 2019“
T1  - Aktivnosti na smanjenju emisije gasova sa efektom staklene bašte
T1  - Activities in order to reduce gas emission with effect of greenhouse
EP  - 56
SP  - 49
ER  - 

@conference{
author = "Mihajlović, Slavica and Blagojev, Marina and Sekulić, Živko",
year = "2019",
abstract = "Zaštita životne sredine je izuzetno važana u svim zemljama i u direktnoj je vezi sa stepenom
ekonomskog razvoja i nivoa edukacije stanovništa o značaju zdrave životne sredine i načinu njenog
očuvanja. Ubrzani tehnološki razvoj dovodi do poboljšanja kvaliteta života u svim sferama ljudske
aktivnosti, ali paralelno sa tim stvara se mogućnost veće degradacije životne sredine. Zbog toga je
važno analizirati negativan uticaj svih primenjenih tehničko-tehnoloških procesa kao i elemente
kontrolisanog korišćenje prirodnih resursa i energije, kako bi se na vreme usvojila strategija i
definisale aktivnosti u cilju sprovođenja adekvatnih mera zaštite životne sredine. Jedan od od velikih
problema u zaštiti životne sredine je pojava emisije gasova sa efektom staklene bašte. Svetske
organizacije koje se bave zaštitom životne sredine pružaju veliki podsticaj za razvoj i stvaranje boljih,
inovativnijih održivih rešenja u građevinarstvu. Tako je jedan od prioriteta proizvođača cementa
pronalaženje novih načina za daljim smanjenjem potrošnje energije i emisije CO2 koja je najveća u
fazi proizvodnje klinkera (proizvod procesa pečenja cementa prilikom spravljanja portland cementa).
Tako neprekidno nastaju nova rešenja koja smanjuju količinu klinkera dok u isto vreme potenciraju
upotrebu alternativnih materijala. Materijali koji mogu zameniti upotrebu cementa (supplementary
cementitious materials- SCM), kao i mešavine cementa nude prednosti u boljim karakteristikama i
održivosti za one koji grade i one koji koriste građevine svih vrsta. Prednosti su, ne samo u
dugotrajnijem betonu boljeg kvaliteta, već i u manjoj potrošnji energije i emisije gasova sa efektom
staklene bašte.",
publisher = "Beograd : Institut za tehnologiju nuklearnih i drugih mineralnih sirovina",
journal = "X Simpozijum sa međunarodnim učešćem „Rudarstvo 2019“",
title = "Aktivnosti na smanjenju emisije gasova sa efektom staklene bašte, Activities in order to reduce gas emission with effect of greenhouse",
pages = "56-49"
}

Mihajlović, S., Blagojev, M.,& Sekulić, Ž.. (2019). Aktivnosti na smanjenju emisije gasova sa efektom staklene bašte. in X Simpozijum sa međunarodnim učešćem „Rudarstvo 2019“
Beograd : Institut za tehnologiju nuklearnih i drugih mineralnih sirovina., 49-56.

Mihajlović S, Blagojev M, Sekulić Ž. Aktivnosti na smanjenju emisije gasova sa efektom staklene bašte. in X Simpozijum sa međunarodnim učešćem „Rudarstvo 2019“. 2019;:49-56..

Mihajlović, Slavica, Blagojev, Marina, Sekulić, Živko, "Aktivnosti na smanjenju emisije gasova sa efektom staklene bašte" in X Simpozijum sa međunarodnim učešćem „Rudarstvo 2019“ (2019):49-56.

TY  - CONF
AU  - Mihajlović, Slavica
AU  - Blagojev, Marina
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/689
AB  - Prirodni resursi su ograničeni i njihova nekontrolisana eksploatacija može imati
negativne posledice na životnu sredinu. Zbog toga je neophodno pronaći načine za njihovo održivo
korišćenje. Održivi razvoj je okvir za oblikovanje politika i strategija kontinualnog državnog i
socijalnog napretka, bez štete za okolinu i prirodne izvore bitne za ljudske delatnosti u budućnosti.
Jedan od modela kojim se reguliše održivo korišćenje je niz strategija i zakonskih regulativa koje
uređuju oblast eksploatacije prirodnih resursa i energije. Osnovni cilj je osigurati održivo
korišćenje prirodnih izvora kako na nacionalnom tako i na međunarodnom, globalnom, nivou.
Održivo korišćenje prirodnih resursa je u direktnoj vezi sa zaštitom životne sredine. Takođe,
očuvanje radne i životne sredine je povezano sa stepenom ekonomskog razvoja i nivoa edukacije
stanovništa o značaju zdrave životne sredine i načinu njenog očuvanja. Ubrzani tehnološki razvoj
dovodi do poboljšanja kvaliteta života u svim sferama ljudskih aktivnosti, ali paralelno sa tim
stvara se mogućnost veće degradacije životne sredine. Zbog toga je neophodno da se u okviru
ciljeva razvojne politike društva uvrste i pravilni kriterijumi koji će doprinositi održivom razvoju.
Samo na taj način doprinosimo očuvanju životne sredine i eliminisanju svih akcidentnih situacija
koje ugrožavaju ravnotežu prirodnih ekosistema.
PB  - Beograd : Beogradska politehnika
C3  - V naučno-stručni skup sa međunarodnim učešćem „Politehnika“
T1  - Eksploatacija prirodnih resursa u funkciji održivog razvoja
EP  - 192
SP  - 188
ER  - 

@conference{
author = "Mihajlović, Slavica and Blagojev, Marina",
year = "2019",
abstract = "Prirodni resursi su ograničeni i njihova nekontrolisana eksploatacija može imati
negativne posledice na životnu sredinu. Zbog toga je neophodno pronaći načine za njihovo održivo
korišćenje. Održivi razvoj je okvir za oblikovanje politika i strategija kontinualnog državnog i
socijalnog napretka, bez štete za okolinu i prirodne izvore bitne za ljudske delatnosti u budućnosti.
Jedan od modela kojim se reguliše održivo korišćenje je niz strategija i zakonskih regulativa koje
uređuju oblast eksploatacije prirodnih resursa i energije. Osnovni cilj je osigurati održivo
korišćenje prirodnih izvora kako na nacionalnom tako i na međunarodnom, globalnom, nivou.
Održivo korišćenje prirodnih resursa je u direktnoj vezi sa zaštitom životne sredine. Takođe,
očuvanje radne i životne sredine je povezano sa stepenom ekonomskog razvoja i nivoa edukacije
stanovništa o značaju zdrave životne sredine i načinu njenog očuvanja. Ubrzani tehnološki razvoj
dovodi do poboljšanja kvaliteta života u svim sferama ljudskih aktivnosti, ali paralelno sa tim
stvara se mogućnost veće degradacije životne sredine. Zbog toga je neophodno da se u okviru
ciljeva razvojne politike društva uvrste i pravilni kriterijumi koji će doprinositi održivom razvoju.
Samo na taj način doprinosimo očuvanju životne sredine i eliminisanju svih akcidentnih situacija
koje ugrožavaju ravnotežu prirodnih ekosistema.",
publisher = "Beograd : Beogradska politehnika",
journal = "V naučno-stručni skup sa međunarodnim učešćem „Politehnika“",
title = "Eksploatacija prirodnih resursa u funkciji održivog razvoja",
pages = "192-188"
}

Mihajlović, S.,& Blagojev, M.. (2019). Eksploatacija prirodnih resursa u funkciji održivog razvoja. in V naučno-stručni skup sa međunarodnim učešćem „Politehnika“
Beograd : Beogradska politehnika., 188-192.

Mihajlović S, Blagojev M. Eksploatacija prirodnih resursa u funkciji održivog razvoja. in V naučno-stručni skup sa međunarodnim učešćem „Politehnika“. 2019;:188-192..

Mihajlović, Slavica, Blagojev, Marina, "Eksploatacija prirodnih resursa u funkciji održivog razvoja" in V naučno-stručni skup sa međunarodnim učešćem „Politehnika“ (2019):188-192.

TY  - CONF
AU  - Andrić, Ljubiša
AU  - Radulović, Dragan
AU  - Harbinja, Muhamed
AU  - Petrov, Milan
AU  - Marković, Marija
AU  - Stojanović, Jovica
AU  - Pavlović, Marko
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1158
AB  - Mikronizacija pirofilita je veliki tehnološko-tehnički problem, iz razloga što klasične mašine za usitnjavanje, ne mogu, svojim procesnim uslovima, da ga mikroniziraju do finog i posebno veoma finog granulometrijskog sastava, koji je neophodan za nove savremene domene industrijke primene. Iz ovih razloga, neophodno je dobro poznavanje njihovih fizičko-hemijskih, mineraloških, mehaničkih osobina, i posebno mehanizama procesa njihovog finog usitnjavanja (mikronizacije).Detaljnim istraživanjima kinetike mikronizirajućeg mlevenja pirofilita, dobijeni su elementi za određivanje efikasnosti rada vibracionih i ultra-centrifugalnih mlinova, a samim tim stečeni su uslovi za definisanje kako tehnoloških parametara mikronizacije, tako i parametara proizvoda mikronizacije. U isto vreme, na osnovu detaljne fizičko-hemijske, mineraloške i rentgenske karakterizacije mikroniziranih proizvoda pirofilita, uočene su određene fizičko-hemijske promene u njihovoj strukturi (prelaz pirofilita u amorfno stanje), što je sigurno posledica rada pomenutih mlinova.
PB  - Beograd : Institut za tehnologiju nuklearnih i drugih mineralnih sirovina
C3  - X Simpozijum sa međunarodnim učešćem-“Rudarstvo 2019”
T1  - Mikronizirajuće mlevenje pirofilita-Parsović-Konjic (BiH)
EP  - 113
SP  - 103
ER  - 

@conference{
author = "Andrić, Ljubiša and Radulović, Dragan and Harbinja, Muhamed and Petrov, Milan and Marković, Marija and Stojanović, Jovica and Pavlović, Marko",
year = "2019",
abstract = "Mikronizacija pirofilita je veliki tehnološko-tehnički problem, iz razloga što klasične mašine za usitnjavanje, ne mogu, svojim procesnim uslovima, da ga mikroniziraju do finog i posebno veoma finog granulometrijskog sastava, koji je neophodan za nove savremene domene industrijke primene. Iz ovih razloga, neophodno je dobro poznavanje njihovih fizičko-hemijskih, mineraloških, mehaničkih osobina, i posebno mehanizama procesa njihovog finog usitnjavanja (mikronizacije).Detaljnim istraživanjima kinetike mikronizirajućeg mlevenja pirofilita, dobijeni su elementi za određivanje efikasnosti rada vibracionih i ultra-centrifugalnih mlinova, a samim tim stečeni su uslovi za definisanje kako tehnoloških parametara mikronizacije, tako i parametara proizvoda mikronizacije. U isto vreme, na osnovu detaljne fizičko-hemijske, mineraloške i rentgenske karakterizacije mikroniziranih proizvoda pirofilita, uočene su određene fizičko-hemijske promene u njihovoj strukturi (prelaz pirofilita u amorfno stanje), što je sigurno posledica rada pomenutih mlinova.",
publisher = "Beograd : Institut za tehnologiju nuklearnih i drugih mineralnih sirovina",
journal = "X Simpozijum sa međunarodnim učešćem-“Rudarstvo 2019”",
title = "Mikronizirajuće mlevenje pirofilita-Parsović-Konjic (BiH)",
pages = "113-103"
}

Andrić, L., Radulović, D., Harbinja, M., Petrov, M., Marković, M., Stojanović, J.,& Pavlović, M.. (2019). Mikronizirajuće mlevenje pirofilita-Parsović-Konjic (BiH). in X Simpozijum sa međunarodnim učešćem-“Rudarstvo 2019”
Beograd : Institut za tehnologiju nuklearnih i drugih mineralnih sirovina., 103-113.

Andrić L, Radulović D, Harbinja M, Petrov M, Marković M, Stojanović J, Pavlović M. Mikronizirajuće mlevenje pirofilita-Parsović-Konjic (BiH). in X Simpozijum sa međunarodnim učešćem-“Rudarstvo 2019”. 2019;:103-113..

Andrić, Ljubiša, Radulović, Dragan, Harbinja, Muhamed, Petrov, Milan, Marković, Marija, Stojanović, Jovica, Pavlović, Marko, "Mikronizirajuće mlevenje pirofilita-Parsović-Konjic (BiH)" in X Simpozijum sa međunarodnim učešćem-“Rudarstvo 2019” (2019):103-113.

TY  - CONF
AU  - Radulović, Dragan
AU  - Đorđević, Dragan
AU  - Andrić, Ljubiša
AU  - Petrov, Milan
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1083
AB  - U ovom radu prikazani su rezulati rada Rudnika-Grot. Pre svega su prikazani stanje, tehnologija I način rada na rudi olova i cinka koja se eksploatisala i prerađivala u prethodnom periodu. Prikazano je osnovno eksploataciono polje Rudnika Blagodat do 2018., geološke karakteristike ležišta, mineralni sastva i ostale fizičko-hemijske osobine rude. Osim toga u radu je prikazana tehnološka inovacija iz 2017. kojom je izmenjena šema tehnološkog postupka u pogonu za flotiranje olovo- cinkane rude Rudnika Grot. U okviru ovoga dati su svi tehnološki parametri, tehničko-tehnološki efekti izvedene inovacije, kao i postignute uštede u postupku flotiranja u pogonu.
PB  - Beograd : Institut za tehnologiju nuklearnih i drugih mineralnih sirovina
C3  - X Simpozijum sa međunarodnim učešćem -“Rudarstvo 2019”
T1  - Izmene Tehnološkog Postupka Flotacijske Koncentracije Pb-Zn Rude "Rudnika –Grot A.D." (Blagodat)- Kriva Feja (Vranje)
EP  - 48
SP  - 36
ER  - 

@conference{
author = "Radulović, Dragan and Đorđević, Dragan and Andrić, Ljubiša and Petrov, Milan",
year = "2019",
abstract = "U ovom radu prikazani su rezulati rada Rudnika-Grot. Pre svega su prikazani stanje, tehnologija I način rada na rudi olova i cinka koja se eksploatisala i prerađivala u prethodnom periodu. Prikazano je osnovno eksploataciono polje Rudnika Blagodat do 2018., geološke karakteristike ležišta, mineralni sastva i ostale fizičko-hemijske osobine rude. Osim toga u radu je prikazana tehnološka inovacija iz 2017. kojom je izmenjena šema tehnološkog postupka u pogonu za flotiranje olovo- cinkane rude Rudnika Grot. U okviru ovoga dati su svi tehnološki parametri, tehničko-tehnološki efekti izvedene inovacije, kao i postignute uštede u postupku flotiranja u pogonu.",
publisher = "Beograd : Institut za tehnologiju nuklearnih i drugih mineralnih sirovina",
journal = "X Simpozijum sa međunarodnim učešćem -“Rudarstvo 2019”",
title = "Izmene Tehnološkog Postupka Flotacijske Koncentracije Pb-Zn Rude "Rudnika –Grot A.D." (Blagodat)- Kriva Feja (Vranje)",
pages = "48-36"
}

Radulović, D., Đorđević, D., Andrić, L.,& Petrov, M.. (2019). Izmene Tehnološkog Postupka Flotacijske Koncentracije Pb-Zn Rude "Rudnika –Grot A.D." (Blagodat)- Kriva Feja (Vranje). in X Simpozijum sa međunarodnim učešćem -“Rudarstvo 2019”
Beograd : Institut za tehnologiju nuklearnih i drugih mineralnih sirovina., 36-48.

Radulović D, Đorđević D, Andrić L, Petrov M. Izmene Tehnološkog Postupka Flotacijske Koncentracije Pb-Zn Rude "Rudnika –Grot A.D." (Blagodat)- Kriva Feja (Vranje). in X Simpozijum sa međunarodnim učešćem -“Rudarstvo 2019”. 2019;:36-48..

Radulović, Dragan, Đorđević, Dragan, Andrić, Ljubiša, Petrov, Milan, "Izmene Tehnološkog Postupka Flotacijske Koncentracije Pb-Zn Rude "Rudnika –Grot A.D." (Blagodat)- Kriva Feja (Vranje)" in X Simpozijum sa međunarodnim učešćem -“Rudarstvo 2019” (2019):36-48.

TY  - CONF
AU  - Radulović, Dragan
AU  - Andrić, Ljubiša
AU  - Petrov, Milan
AU  - Božović, Darko
AU  - Pavlović, Marko
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1043
AB  - Paper presents results of investigations of the possibility of using “Brijeg”-Ulcinj limestone as filler in various industries. Micronization, granulometric composition, oil and water absorption and degree of whiteness were investigated, and chemical and thermal analyses were performed. Physico-chemical properties of this sample classify it among high quality carbonate raw materials with high CaCO3 content of 98.21%, with low contents of MgCO3 0.88 % and SiO2 0.16 %. Its quality satisfies requirements of standards on using of calcium carbonate as filler in next industries: paints and coatings; rubber and PVC; glass; foundry ; sugar industry production of mineral fertilizers and metallurgy.
PB  - Bor : University of Belgrade, Technical Faculty in Bor
C3  - XIII International Mineral Processing and Recycling (XIII IMPRC) Conference
T1  - Obtaining Fillers Based on Limestone from Deposit Brijeg-Ulcinj for Applications in Various Industries
EP  - 126
SP  - 119
ER  - 

@conference{
author = "Radulović, Dragan and Andrić, Ljubiša and Petrov, Milan and Božović, Darko and Pavlović, Marko",
year = "2019",
abstract = "Paper presents results of investigations of the possibility of using “Brijeg”-Ulcinj limestone as filler in various industries. Micronization, granulometric composition, oil and water absorption and degree of whiteness were investigated, and chemical and thermal analyses were performed. Physico-chemical properties of this sample classify it among high quality carbonate raw materials with high CaCO3 content of 98.21%, with low contents of MgCO3 0.88 % and SiO2 0.16 %. Its quality satisfies requirements of standards on using of calcium carbonate as filler in next industries: paints and coatings; rubber and PVC; glass; foundry ; sugar industry production of mineral fertilizers and metallurgy.",
publisher = "Bor : University of Belgrade, Technical Faculty in Bor",
journal = "XIII International Mineral Processing and Recycling (XIII IMPRC) Conference",
title = "Obtaining Fillers Based on Limestone from Deposit Brijeg-Ulcinj for Applications in Various Industries",
pages = "126-119"
}

Radulović, D., Andrić, L., Petrov, M., Božović, D.,& Pavlović, M.. (2019). Obtaining Fillers Based on Limestone from Deposit Brijeg-Ulcinj for Applications in Various Industries. in XIII International Mineral Processing and Recycling (XIII IMPRC) Conference
Bor : University of Belgrade, Technical Faculty in Bor., 119-126.

Radulović D, Andrić L, Petrov M, Božović D, Pavlović M. Obtaining Fillers Based on Limestone from Deposit Brijeg-Ulcinj for Applications in Various Industries. in XIII International Mineral Processing and Recycling (XIII IMPRC) Conference. 2019;:119-126..

Radulović, Dragan, Andrić, Ljubiša, Petrov, Milan, Božović, Darko, Pavlović, Marko, "Obtaining Fillers Based on Limestone from Deposit Brijeg-Ulcinj for Applications in Various Industries" in XIII International Mineral Processing and Recycling (XIII IMPRC) Conference (2019):119-126.

TY  - JOUR
AU  - Spasojević, Milica
AU  - Daković, Aleksandra
AU  - Rottinghaus, George E.
AU  - Radosavljević-Mihajlović, Ana
AU  - Marković, Marija
AU  - Krajišnik, Danina
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/527
AB  - Octadecyldimethylbenzyl ammonium chloride (OA) was used as a surfactant for the preparation of organokaolin. The natural kaolin (from a plant for production of quartz sand in Rgotina, Serbia) was modified with a surfactant in amount equal to 90% of the kaolin cation exchange capacity (CEC). FTIR spectroscopy was used for characterization of the new product. FTIR spectra confirmed the presence of OA ions at the kaolin surface. Adsorption of mycotoxins - zearalenone (ZEN) and ochratoxin A (OCHRA) was studied by organokaolin at different amounts of adsorbent and pHs. Results showed that the presence of organic cations in the kaolin structure increased adsorption of both ZEN and OCHRA. Adsorption of the mycotoxins by organokaolin increased with increasing amounts of adsorbent and, at the lowest amount of solids in suspension, adsorption of ZEN and OCHRA was slightly higher at pH 7 and 9.
PB  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metallurgical & Materials Engineering
T1  - Zearalenone and ochratoxin a: adsorption by kaolin modified with surfactant
EP  - 45
IS  - 1
SP  - 39
VL  - 25
DO  - 10.30544/413
UR  - conv_848
ER  - 

@article{
author = "Spasojević, Milica and Daković, Aleksandra and Rottinghaus, George E. and Radosavljević-Mihajlović, Ana and Marković, Marija and Krajišnik, Danina",
year = "2019",
abstract = "Octadecyldimethylbenzyl ammonium chloride (OA) was used as a surfactant for the preparation of organokaolin. The natural kaolin (from a plant for production of quartz sand in Rgotina, Serbia) was modified with a surfactant in amount equal to 90% of the kaolin cation exchange capacity (CEC). FTIR spectroscopy was used for characterization of the new product. FTIR spectra confirmed the presence of OA ions at the kaolin surface. Adsorption of mycotoxins - zearalenone (ZEN) and ochratoxin A (OCHRA) was studied by organokaolin at different amounts of adsorbent and pHs. Results showed that the presence of organic cations in the kaolin structure increased adsorption of both ZEN and OCHRA. Adsorption of the mycotoxins by organokaolin increased with increasing amounts of adsorbent and, at the lowest amount of solids in suspension, adsorption of ZEN and OCHRA was slightly higher at pH 7 and 9.",
publisher = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metallurgical & Materials Engineering",
title = "Zearalenone and ochratoxin a: adsorption by kaolin modified with surfactant",
pages = "45-39",
number = "1",
volume = "25",
doi = "10.30544/413",
url = "conv_848"
}

Spasojević, M., Daković, A., Rottinghaus, G. E., Radosavljević-Mihajlović, A., Marković, M.,& Krajišnik, D.. (2019). Zearalenone and ochratoxin a: adsorption by kaolin modified with surfactant. in Metallurgical & Materials Engineering
Savez inženjera metalurgije Srbije, Beograd., 25(1), 39-45.
https://doi.org/10.30544/413
conv_848

Spasojević M, Daković A, Rottinghaus GE, Radosavljević-Mihajlović A, Marković M, Krajišnik D. Zearalenone and ochratoxin a: adsorption by kaolin modified with surfactant. in Metallurgical & Materials Engineering. 2019;25(1):39-45.
doi:10.30544/413
conv_848 .

Spasojević, Milica, Daković, Aleksandra, Rottinghaus, George E., Radosavljević-Mihajlović, Ana, Marković, Marija, Krajišnik, Danina, "Zearalenone and ochratoxin a: adsorption by kaolin modified with surfactant" in Metallurgical & Materials Engineering, 25, no. 1 (2019):39-45,
https://doi.org/10.30544/413 .,
conv_848 .

TY  - JOUR
AU  - Mihajlović, Slavica
AU  - Sekulić, Živko
AU  - Kašić, Vladan
AU  - Sokić, Miroslav
AU  - Blagojev, Marina S.
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/518
AB  - Geološka istraživanja na području centralne Srbije, u reonu opštine Rekovac pokazala su prisustvo pojave krečnjaka "Sibnička Čukara". Krečnjak je sirovina koja ima primenu u različitim industrijskim granama kao što su: industrija kreča, šećera, stočne hrane, mineralnih đubriva, farmacija, u metalurgiji i dr. U kojim industrijskim granama ova sirovina može da ima primenu nakon određenih postupaka pripreme, zavisi od njenog kvaliteta. Preliminarna laboratorijska ispitivanja i karakterizacija pojedinih asortimana dobijenih iz krečnjaka "Sibnička Čukara" su potvrdila mogućnost primene u sledećim oblastima: drobljenog krečnjaka u proizvodnji kreča i šećera i u metalurgiji kao II klasa, mlevenog kao punilo za asfalt, kao dodatak stočnoj hrani, ali samo za svinje koje su starije od 16 nedelja zbog sadržaja teških metala, kao sredstvo u proizvodnji mineralnog đubriva i za odsumporavanje dimnih gasova.
AB  - Geological research carried out in the area of Central Serbia, municipality of Rekovac, showed the presence of limestone"Sibnička Čukara". Limestone is a raw material that has been used in various industrial branches such as: industry of lime, sugar, green-foder, mineral fertilizers, also in farmacy, metallurgy, etc. This raw material can have application in various industrial branches, which depends on its quality. Preliminary laboratory tests and characterization of certain limestone assortments obtained from "Sibnička Čukara" confirmed the possibility of application in the following areas: crushed limestone in the production of lime and sugar, in metallurgy as a second-class material, crushed limestone as a filler for asphalt and animal feed (but only for pigs older than 16 weeks, due to the content of heavy metals), then as an agent for production of mineral fertilizers and thereupon for flue-gas desulfurization.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - Preliminarna ispitivanja i ocena primenjivosti krečnjaka "Sibnička Čukara" - opština Rekovac
T1  - Preliminary examinations and possible application of limestone "Sibnička Čukara" - municipality of Rekovac
EP  - 387
IS  - 3
SP  - 378
VL  - 74
DO  - 10.5937/tehnika1903378M
UR  - conv_26
ER  - 

@article{
author = "Mihajlović, Slavica and Sekulić, Živko and Kašić, Vladan and Sokić, Miroslav and Blagojev, Marina S.",
year = "2019",
abstract = "Geološka istraživanja na području centralne Srbije, u reonu opštine Rekovac pokazala su prisustvo pojave krečnjaka "Sibnička Čukara". Krečnjak je sirovina koja ima primenu u različitim industrijskim granama kao što su: industrija kreča, šećera, stočne hrane, mineralnih đubriva, farmacija, u metalurgiji i dr. U kojim industrijskim granama ova sirovina može da ima primenu nakon određenih postupaka pripreme, zavisi od njenog kvaliteta. Preliminarna laboratorijska ispitivanja i karakterizacija pojedinih asortimana dobijenih iz krečnjaka "Sibnička Čukara" su potvrdila mogućnost primene u sledećim oblastima: drobljenog krečnjaka u proizvodnji kreča i šećera i u metalurgiji kao II klasa, mlevenog kao punilo za asfalt, kao dodatak stočnoj hrani, ali samo za svinje koje su starije od 16 nedelja zbog sadržaja teških metala, kao sredstvo u proizvodnji mineralnog đubriva i za odsumporavanje dimnih gasova., Geological research carried out in the area of Central Serbia, municipality of Rekovac, showed the presence of limestone"Sibnička Čukara". Limestone is a raw material that has been used in various industrial branches such as: industry of lime, sugar, green-foder, mineral fertilizers, also in farmacy, metallurgy, etc. This raw material can have application in various industrial branches, which depends on its quality. Preliminary laboratory tests and characterization of certain limestone assortments obtained from "Sibnička Čukara" confirmed the possibility of application in the following areas: crushed limestone in the production of lime and sugar, in metallurgy as a second-class material, crushed limestone as a filler for asphalt and animal feed (but only for pigs older than 16 weeks, due to the content of heavy metals), then as an agent for production of mineral fertilizers and thereupon for flue-gas desulfurization.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "Preliminarna ispitivanja i ocena primenjivosti krečnjaka "Sibnička Čukara" - opština Rekovac, Preliminary examinations and possible application of limestone "Sibnička Čukara" - municipality of Rekovac",
pages = "387-378",
number = "3",
volume = "74",
doi = "10.5937/tehnika1903378M",
url = "conv_26"
}

Mihajlović, S., Sekulić, Ž., Kašić, V., Sokić, M.,& Blagojev, M. S.. (2019). Preliminarna ispitivanja i ocena primenjivosti krečnjaka "Sibnička Čukara" - opština Rekovac. in Tehnika
Savez inženjera i tehničara Srbije, Beograd., 74(3), 378-387.
https://doi.org/10.5937/tehnika1903378M
conv_26

Mihajlović S, Sekulić Ž, Kašić V, Sokić M, Blagojev MS. Preliminarna ispitivanja i ocena primenjivosti krečnjaka "Sibnička Čukara" - opština Rekovac. in Tehnika. 2019;74(3):378-387.
doi:10.5937/tehnika1903378M
conv_26 .

Mihajlović, Slavica, Sekulić, Živko, Kašić, Vladan, Sokić, Miroslav, Blagojev, Marina S., "Preliminarna ispitivanja i ocena primenjivosti krečnjaka "Sibnička Čukara" - opština Rekovac" in Tehnika, 74, no. 3 (2019):378-387,
https://doi.org/10.5937/tehnika1903378M .,
conv_26 .

TY  - JOUR
AU  - Mihajlović, Slavica
AU  - Sekulić, Živko
AU  - Blagojev, Marina S.
AU  - Ignjatović, Miroslav R.
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/516
AB  - The paper presents the process of quartz sand processing from the "Bijela Stijena" - Skocic deposit in the plant "Kesogradnja d.o.o." at Kozluk near Zvornik, Republic of Srpska. Bearing in mind the fact that this quartz sand is used for water glass production in the company "Birac" - Zvornik or "Alumina" Zvornik, it was necessary to meet the quality requirements prescribed by that industrial production. Thus, the required size was -0.4+0.05 mm and the Fe2O3 content was maximum of 0.04%. Based on the laboratory tests, a technological scheme for the quartz raw material valorization was conceived in the separation of the company "Kesogradnja d.o.o.". The obtained results showed that quartz sand for water glass size fraction -0.4+0.05 mm could be obtained in the plant. Also, by introducing a magnetic concentration after washing and grading, the Fe2O3 content was reduced from 0.131% as it is in the initial sample to 0.038% which meets the required conditions from the water glass producers.
PB  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metallurgical & Materials Engineering
T1  - The process of obtaining quartz sand size fraction -0.4
EP  - 68
IS  - 1
SP  - 59
VL  - 25
DO  - 10.30544/406
UR  - conv_849
ER  - 

@article{
author = "Mihajlović, Slavica and Sekulić, Živko and Blagojev, Marina S. and Ignjatović, Miroslav R.",
year = "2019",
abstract = "The paper presents the process of quartz sand processing from the "Bijela Stijena" - Skocic deposit in the plant "Kesogradnja d.o.o." at Kozluk near Zvornik, Republic of Srpska. Bearing in mind the fact that this quartz sand is used for water glass production in the company "Birac" - Zvornik or "Alumina" Zvornik, it was necessary to meet the quality requirements prescribed by that industrial production. Thus, the required size was -0.4+0.05 mm and the Fe2O3 content was maximum of 0.04%. Based on the laboratory tests, a technological scheme for the quartz raw material valorization was conceived in the separation of the company "Kesogradnja d.o.o.". The obtained results showed that quartz sand for water glass size fraction -0.4+0.05 mm could be obtained in the plant. Also, by introducing a magnetic concentration after washing and grading, the Fe2O3 content was reduced from 0.131% as it is in the initial sample to 0.038% which meets the required conditions from the water glass producers.",
publisher = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metallurgical & Materials Engineering",
title = "The process of obtaining quartz sand size fraction -0.4",
pages = "68-59",
number = "1",
volume = "25",
doi = "10.30544/406",
url = "conv_849"
}

Mihajlović, S., Sekulić, Ž., Blagojev, M. S.,& Ignjatović, M. R.. (2019). The process of obtaining quartz sand size fraction -0.4. in Metallurgical & Materials Engineering
Savez inženjera metalurgije Srbije, Beograd., 25(1), 59-68.
https://doi.org/10.30544/406
conv_849

Mihajlović S, Sekulić Ž, Blagojev MS, Ignjatović MR. The process of obtaining quartz sand size fraction -0.4. in Metallurgical & Materials Engineering. 2019;25(1):59-68.
doi:10.30544/406
conv_849 .

Mihajlović, Slavica, Sekulić, Živko, Blagojev, Marina S., Ignjatović, Miroslav R., "The process of obtaining quartz sand size fraction -0.4" in Metallurgical & Materials Engineering, 25, no. 1 (2019):59-68,
https://doi.org/10.30544/406 .,
conv_849 .

TY  - JOUR
AU  - Mihajlović, Slavica
AU  - Savić, Ljubinko
AU  - Radosavljević, Dragana B.
AU  - Savić, Ljiljana B.
AU  - Ignjatović, Miroslav R.
AU  - Blagojev, Marina S.
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/500
AB  - The main problem of hydraulic transport is the resistance generated during the mixture transport through the pipe-line. Testing the flow characteristics of mixtures, shown in this paper, are based on the principles of determining the unit energy losses by a mathematical calculation using the non-linear regression - the Levenberg-Marquardt algorithm. Such obtained results allow determining a transport rate in the horizontal pipe-line, depending on the mixture bulk density and pipe-line diameter. The flotation tailings is mainly used as a filling material in the mine "Trepca" - Stari Trg. According to the grain size distribution, it is a fine-grained material of a size of 0.074 mm to 1.2 mm. It is a multicomponent material containing pyrite, pyrrhotine and other heavy metals, and therefore, has a high bulk mass. The average rate of the hydromixture, in which the energy losses reach the minimum value, depends on the pipe-line diameter and kinetic bulk density of the mixture. For the test interval of change in the pipe-line diameter, shown in this paper (0.168 mm, 0.176 mm, 0.193 mm, and 0.225 mm), and kinetic bulk density of the hydraulic mixture (1-1.6 kg/m(3)), this rate ranges from 3-5.5 m/s. The increase of the energy losses in the hydraulic mixture transport increases proportionality with the increase of its kinetic bulk density. The results, presented in this paper, show that the required bulk density of 1.6 kg/m(3) should be accepted as a limit from a point of view of the hydraulic transport cost-efficiency.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - the non-linear regression - the levenberg-marquardt algorithm for assumption the energy losses of hydraulic transport in a case of the mine "trepca"
EP  - 2938
IS  - 5
SP  - 2929
VL  - 23
DO  - 10.2298/TSCI180608252M
UR  - conv_866
ER  - 

@article{
author = "Mihajlović, Slavica and Savić, Ljubinko and Radosavljević, Dragana B. and Savić, Ljiljana B. and Ignjatović, Miroslav R. and Blagojev, Marina S.",
year = "2019",
abstract = "The main problem of hydraulic transport is the resistance generated during the mixture transport through the pipe-line. Testing the flow characteristics of mixtures, shown in this paper, are based on the principles of determining the unit energy losses by a mathematical calculation using the non-linear regression - the Levenberg-Marquardt algorithm. Such obtained results allow determining a transport rate in the horizontal pipe-line, depending on the mixture bulk density and pipe-line diameter. The flotation tailings is mainly used as a filling material in the mine "Trepca" - Stari Trg. According to the grain size distribution, it is a fine-grained material of a size of 0.074 mm to 1.2 mm. It is a multicomponent material containing pyrite, pyrrhotine and other heavy metals, and therefore, has a high bulk mass. The average rate of the hydromixture, in which the energy losses reach the minimum value, depends on the pipe-line diameter and kinetic bulk density of the mixture. For the test interval of change in the pipe-line diameter, shown in this paper (0.168 mm, 0.176 mm, 0.193 mm, and 0.225 mm), and kinetic bulk density of the hydraulic mixture (1-1.6 kg/m(3)), this rate ranges from 3-5.5 m/s. The increase of the energy losses in the hydraulic mixture transport increases proportionality with the increase of its kinetic bulk density. The results, presented in this paper, show that the required bulk density of 1.6 kg/m(3) should be accepted as a limit from a point of view of the hydraulic transport cost-efficiency.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "the non-linear regression - the levenberg-marquardt algorithm for assumption the energy losses of hydraulic transport in a case of the mine "trepca"",
pages = "2938-2929",
number = "5",
volume = "23",
doi = "10.2298/TSCI180608252M",
url = "conv_866"
}

Mihajlović, S., Savić, L., Radosavljević, D. B., Savić, L. B., Ignjatović, M. R.,& Blagojev, M. S.. (2019). the non-linear regression - the levenberg-marquardt algorithm for assumption the energy losses of hydraulic transport in a case of the mine "trepca". in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 23(5), 2929-2938.
https://doi.org/10.2298/TSCI180608252M
conv_866

Mihajlović S, Savić L, Radosavljević DB, Savić LB, Ignjatović MR, Blagojev MS. the non-linear regression - the levenberg-marquardt algorithm for assumption the energy losses of hydraulic transport in a case of the mine "trepca". in Thermal Science. 2019;23(5):2929-2938.
doi:10.2298/TSCI180608252M
conv_866 .

Mihajlović, Slavica, Savić, Ljubinko, Radosavljević, Dragana B., Savić, Ljiljana B., Ignjatović, Miroslav R., Blagojev, Marina S., "the non-linear regression - the levenberg-marquardt algorithm for assumption the energy losses of hydraulic transport in a case of the mine "trepca"" in Thermal Science, 23, no. 5 (2019):2929-2938,
https://doi.org/10.2298/TSCI180608252M .,
conv_866 .

TY  - JOUR
AU  - Milojković, Jelena
AU  - Lopičić, Zorica
AU  - Anastopoulos, Ioannis
AU  - Petrović, Jelena
AU  - Milićević, Sonja
AU  - Petrović, Marija
AU  - Stojanović, Mirjana
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/498
AB  - A new biosorbent - alginate encapsulated with Myriophyllum spicatum - MsA was investigated for lead ions removal. This biosorbent was characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), zeta potential, X ray Diffraction (XRD) and size distribution analysis. FT-IR analysis demonstrated that the lead ions sequestration mechanism included ion exchange and lead complexation with the carboxyl, carbonyl and hydroxyl groups in MsA. In order to better understand the mechanisms of the binding of Pb(II) on immobilized M. spicatum beads, 3 reaction and one diffusion based kinetic models were applied on kinetic data removal lead ions on three materials: M. spicatum, Ca-alginate and MsA. Myriophyllum spicatum encapsulated with alginate - MsA have higher adsorption capacity than M. spicatum. Among examined six isotherms Redlich-Peterson and the Langmuir isotherm model exhibited the best fit to the experimental data, with capacities ranging from 230 to 268.7 mg/g. Among the various tested desorption agents, nitric acid has proven to be the best. The obtained results suggest that the immobilized M. spicatum biosorbent holds great potential for lead wastewater treatment applications.
PB  - Academic Press Ltd- Elsevier Science Ltd, London
T2  - Journal of Environmental Management
T1  - Performance of aquatic weed - Waste Myriophyllum spicatum immobilized in alginate beads for the removal of Pb(II)
EP  - 109
SP  - 97
VL  - 232
DO  - 10.1016/j.jenvman.2018.10.075
UR  - conv_843
ER  - 

@article{
author = "Milojković, Jelena and Lopičić, Zorica and Anastopoulos, Ioannis and Petrović, Jelena and Milićević, Sonja and Petrović, Marija and Stojanović, Mirjana",
year = "2019",
abstract = "A new biosorbent - alginate encapsulated with Myriophyllum spicatum - MsA was investigated for lead ions removal. This biosorbent was characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), zeta potential, X ray Diffraction (XRD) and size distribution analysis. FT-IR analysis demonstrated that the lead ions sequestration mechanism included ion exchange and lead complexation with the carboxyl, carbonyl and hydroxyl groups in MsA. In order to better understand the mechanisms of the binding of Pb(II) on immobilized M. spicatum beads, 3 reaction and one diffusion based kinetic models were applied on kinetic data removal lead ions on three materials: M. spicatum, Ca-alginate and MsA. Myriophyllum spicatum encapsulated with alginate - MsA have higher adsorption capacity than M. spicatum. Among examined six isotherms Redlich-Peterson and the Langmuir isotherm model exhibited the best fit to the experimental data, with capacities ranging from 230 to 268.7 mg/g. Among the various tested desorption agents, nitric acid has proven to be the best. The obtained results suggest that the immobilized M. spicatum biosorbent holds great potential for lead wastewater treatment applications.",
publisher = "Academic Press Ltd- Elsevier Science Ltd, London",
journal = "Journal of Environmental Management",
title = "Performance of aquatic weed - Waste Myriophyllum spicatum immobilized in alginate beads for the removal of Pb(II)",
pages = "109-97",
volume = "232",
doi = "10.1016/j.jenvman.2018.10.075",
url = "conv_843"
}

Milojković, J., Lopičić, Z., Anastopoulos, I., Petrović, J., Milićević, S., Petrović, M.,& Stojanović, M.. (2019). Performance of aquatic weed - Waste Myriophyllum spicatum immobilized in alginate beads for the removal of Pb(II). in Journal of Environmental Management
Academic Press Ltd- Elsevier Science Ltd, London., 232, 97-109.
https://doi.org/10.1016/j.jenvman.2018.10.075
conv_843

Milojković J, Lopičić Z, Anastopoulos I, Petrović J, Milićević S, Petrović M, Stojanović M. Performance of aquatic weed - Waste Myriophyllum spicatum immobilized in alginate beads for the removal of Pb(II). in Journal of Environmental Management. 2019;232:97-109.
doi:10.1016/j.jenvman.2018.10.075
conv_843 .

Milojković, Jelena, Lopičić, Zorica, Anastopoulos, Ioannis, Petrović, Jelena, Milićević, Sonja, Petrović, Marija, Stojanović, Mirjana, "Performance of aquatic weed - Waste Myriophyllum spicatum immobilized in alginate beads for the removal of Pb(II)" in Journal of Environmental Management, 232 (2019):97-109,
https://doi.org/10.1016/j.jenvman.2018.10.075 .,
conv_843 .

TY  - CONF
AU  - Kragović, Milan
AU  - Stojmenović, Marija
AU  - Petrović, Jelena
AU  - Loredo, Jorge
AU  - Pasalić, Snežana
AU  - Nedeljković, Andrijana
AU  - Ristović, Ivica
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/497
AB  - In this paper influence of alginate encapsulation on point of zero charge (pH(pzc)) and thermodynamic properties of the natural and Fe(III)-modified zeolite were investigated. The pH(pzc) was determined by using 0.1000 g of the samples and 50 cm(3) of the solution containing KNO3 in concentrations of 0.0001-0.01 mol/dm(3) for initial pH (pH(i)) in range between 2 and 12. The obtained pH(pzc) were 6.2 for natural (NZA) and 6.5 for modified zeolite encapsulated with alginate (FeA). Influence of the temperature on the adsorption of lead was investigated for different initial lead ions concentrations (180-3200 mgPb(2+)/dm(3)) and temperatures of 30, 40 and 60 degrees C. For both adsorbents, adsorption of lead ions increased with increasing its initial concentration as well as with increasing of the temperature. Also, the best fits of the experimental data were obtained by Freundlich isotherm. The temperature had positive influence adsorption and removal of lead ions increased with increasing its initial concentration as well as with increasing of the temperature. The thermodynamic parameters (the standard free energy of adsorption, standard enthalpy and standard entropy) were also determined. The results showed that lead ions removal from aqueous solutions is much favourable for FeA then NZA.
PB  - Elsevier Science Bv, Amsterdam
C3  - 12th International Conference Interdisciplinarity in Engineering (Inter-Eng 2018)
T1  - Influence of Alginate Encapsulation on Point of Zero Charge (pH(pzc)) and Thermodynamic Properties of the Natural and Fe(III) Modified Zeolite
EP  - 293
SP  - 286
VL  - 32
DO  - 10.1016/j.promfg.2019.02.216
UR  - conv_854
ER  - 

@conference{
author = "Kragović, Milan and Stojmenović, Marija and Petrović, Jelena and Loredo, Jorge and Pasalić, Snežana and Nedeljković, Andrijana and Ristović, Ivica",
year = "2019",
abstract = "In this paper influence of alginate encapsulation on point of zero charge (pH(pzc)) and thermodynamic properties of the natural and Fe(III)-modified zeolite were investigated. The pH(pzc) was determined by using 0.1000 g of the samples and 50 cm(3) of the solution containing KNO3 in concentrations of 0.0001-0.01 mol/dm(3) for initial pH (pH(i)) in range between 2 and 12. The obtained pH(pzc) were 6.2 for natural (NZA) and 6.5 for modified zeolite encapsulated with alginate (FeA). Influence of the temperature on the adsorption of lead was investigated for different initial lead ions concentrations (180-3200 mgPb(2+)/dm(3)) and temperatures of 30, 40 and 60 degrees C. For both adsorbents, adsorption of lead ions increased with increasing its initial concentration as well as with increasing of the temperature. Also, the best fits of the experimental data were obtained by Freundlich isotherm. The temperature had positive influence adsorption and removal of lead ions increased with increasing its initial concentration as well as with increasing of the temperature. The thermodynamic parameters (the standard free energy of adsorption, standard enthalpy and standard entropy) were also determined. The results showed that lead ions removal from aqueous solutions is much favourable for FeA then NZA.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "12th International Conference Interdisciplinarity in Engineering (Inter-Eng 2018)",
title = "Influence of Alginate Encapsulation on Point of Zero Charge (pH(pzc)) and Thermodynamic Properties of the Natural and Fe(III) Modified Zeolite",
pages = "293-286",
volume = "32",
doi = "10.1016/j.promfg.2019.02.216",
url = "conv_854"
}

Kragović, M., Stojmenović, M., Petrović, J., Loredo, J., Pasalić, S., Nedeljković, A.,& Ristović, I.. (2019). Influence of Alginate Encapsulation on Point of Zero Charge (pH(pzc)) and Thermodynamic Properties of the Natural and Fe(III) Modified Zeolite. in 12th International Conference Interdisciplinarity in Engineering (Inter-Eng 2018)
Elsevier Science Bv, Amsterdam., 32, 286-293.
https://doi.org/10.1016/j.promfg.2019.02.216
conv_854

Kragović M, Stojmenović M, Petrović J, Loredo J, Pasalić S, Nedeljković A, Ristović I. Influence of Alginate Encapsulation on Point of Zero Charge (pH(pzc)) and Thermodynamic Properties of the Natural and Fe(III) Modified Zeolite. in 12th International Conference Interdisciplinarity in Engineering (Inter-Eng 2018). 2019;32:286-293.
doi:10.1016/j.promfg.2019.02.216
conv_854 .

Kragović, Milan, Stojmenović, Marija, Petrović, Jelena, Loredo, Jorge, Pasalić, Snežana, Nedeljković, Andrijana, Ristović, Ivica, "Influence of Alginate Encapsulation on Point of Zero Charge (pH(pzc)) and Thermodynamic Properties of the Natural and Fe(III) Modified Zeolite" in 12th International Conference Interdisciplinarity in Engineering (Inter-Eng 2018), 32 (2019):286-293,
https://doi.org/10.1016/j.promfg.2019.02.216 .,
conv_854 .

TY  - JOUR
AU  - Sekulić, Živko
AU  - Mihajlović, Slavica
AU  - Stojanović, Jovica
AU  - Ivošević, Branislav
AU  - Kašić, Vladan
AU  - Ignjatović, Miroslav R.
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/494
AB  - This study shows the results of flotation concentration of mica minerals from kaolinised granite taken from the "Basica bare" deposit - Kobas, Srbac, The Republic of Srpska (B&H). Mineralogical composition of kaolinised granite is as follows: kaolinite, feldspar, quartz, and mica. After separating >0.630 mm, and  LT 0.043 mm size class where kaolinite is concentrated, the rest is -0.630+0.043 mm class containing quartz, feldspar and mica. The mica concentrate was obtained by the flotation concentration, while feldspar and quartz were in the flotation underflow. According to the mineralogical analysis, the most abundant minerals are mica and chlorite/clays, while quartz and feldspar occur much less, and accessory minerals are represented in trace. The semi-quantitative mineralogical analysis obtained by the X-ray powder diffraction (XRPD) method of the mica concentrate amount to: mica approximate to 55%, chlorite/clays approximate to 35%, quartz approximate to 5%, feldspars (plagioclase and K-feldspars combined) approximate to 5%.
PB  - Polska Akad Nauk, Polish Acad Sciences, Warszawa
T2  - Archives of Mining Sciences
T1  - Potentiality of obtaining mica flotation concentrate from kaolinised granite
EP  - 508
IS  - 3
SP  - 499
VL  - 64
DO  - 10.24425/ams.2019.129365
UR  - conv_860
ER  - 

@article{
author = "Sekulić, Živko and Mihajlović, Slavica and Stojanović, Jovica and Ivošević, Branislav and Kašić, Vladan and Ignjatović, Miroslav R.",
year = "2019",
abstract = "This study shows the results of flotation concentration of mica minerals from kaolinised granite taken from the "Basica bare" deposit - Kobas, Srbac, The Republic of Srpska (B&H). Mineralogical composition of kaolinised granite is as follows: kaolinite, feldspar, quartz, and mica. After separating >0.630 mm, and  LT 0.043 mm size class where kaolinite is concentrated, the rest is -0.630+0.043 mm class containing quartz, feldspar and mica. The mica concentrate was obtained by the flotation concentration, while feldspar and quartz were in the flotation underflow. According to the mineralogical analysis, the most abundant minerals are mica and chlorite/clays, while quartz and feldspar occur much less, and accessory minerals are represented in trace. The semi-quantitative mineralogical analysis obtained by the X-ray powder diffraction (XRPD) method of the mica concentrate amount to: mica approximate to 55%, chlorite/clays approximate to 35%, quartz approximate to 5%, feldspars (plagioclase and K-feldspars combined) approximate to 5%.",
publisher = "Polska Akad Nauk, Polish Acad Sciences, Warszawa",
journal = "Archives of Mining Sciences",
title = "Potentiality of obtaining mica flotation concentrate from kaolinised granite",
pages = "508-499",
number = "3",
volume = "64",
doi = "10.24425/ams.2019.129365",
url = "conv_860"
}

Sekulić, Ž., Mihajlović, S., Stojanović, J., Ivošević, B., Kašić, V.,& Ignjatović, M. R.. (2019). Potentiality of obtaining mica flotation concentrate from kaolinised granite. in Archives of Mining Sciences
Polska Akad Nauk, Polish Acad Sciences, Warszawa., 64(3), 499-508.
https://doi.org/10.24425/ams.2019.129365
conv_860

Sekulić Ž, Mihajlović S, Stojanović J, Ivošević B, Kašić V, Ignjatović MR. Potentiality of obtaining mica flotation concentrate from kaolinised granite. in Archives of Mining Sciences. 2019;64(3):499-508.
doi:10.24425/ams.2019.129365
conv_860 .

Sekulić, Živko, Mihajlović, Slavica, Stojanović, Jovica, Ivošević, Branislav, Kašić, Vladan, Ignjatović, Miroslav R., "Potentiality of obtaining mica flotation concentrate from kaolinised granite" in Archives of Mining Sciences, 64, no. 3 (2019):499-508,
https://doi.org/10.24425/ams.2019.129365 .,
conv_860 .

TY  - JOUR
AU  - Pavlović, Marko
AU  - Andrić, Ljubiša
AU  - Radulović, Dragan
AU  - Drmanić, Saša
AU  - Đorđević, Nataša
AU  - Petrov, Milan
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/488
AB  - For the development of the Lost Foam refractory coatings with controlled rheologic properties, the influence of the mechanical activation process on the cordierite-based filler's properties change was examined. First of all, the test referred to the change offiller particles' size and shape, as well as to dispersion ability and stability of the coating suspension. Cordierite was obtained by synthesis in a solid state, out of the mass consisting of kaoline, alumina, quartz, sepiolite. For characterization purposes, the following methods were used: X-ray diffraction, differential thermal analysis, SEM and optical microscopy. Mechanical activation of filler was performed in a vibrating mill. The upper boundary of the grain size was 100% -30 x 10-6 m, the times were (min): 15; 30; 60. The new composition of Lost foam refractory coatings has been developed with a change of the coating production process, as well. These newly synthesized coatings proved to be effective in terms of a positive influence on a surface quality, structural and mechanical properties of aluminium castings. Test results may be useful to have the Lost Foam refractory coatings specified together with other process parameters used for the production of castings according to this casting method.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Influence of Mechanical Activation of a Cordierite-Based Filler on Sedimentation Stability of Lost Foam Refractory Coatings
EP  - 25
IS  - 1
SP  - 15
VL  - 51
DO  - 10.2298/SOS1901015P
UR  - conv_864
ER  - 

@article{
author = "Pavlović, Marko and Andrić, Ljubiša and Radulović, Dragan and Drmanić, Saša and Đorđević, Nataša and Petrov, Milan",
year = "2019",
abstract = "For the development of the Lost Foam refractory coatings with controlled rheologic properties, the influence of the mechanical activation process on the cordierite-based filler's properties change was examined. First of all, the test referred to the change offiller particles' size and shape, as well as to dispersion ability and stability of the coating suspension. Cordierite was obtained by synthesis in a solid state, out of the mass consisting of kaoline, alumina, quartz, sepiolite. For characterization purposes, the following methods were used: X-ray diffraction, differential thermal analysis, SEM and optical microscopy. Mechanical activation of filler was performed in a vibrating mill. The upper boundary of the grain size was 100% -30 x 10-6 m, the times were (min): 15; 30; 60. The new composition of Lost foam refractory coatings has been developed with a change of the coating production process, as well. These newly synthesized coatings proved to be effective in terms of a positive influence on a surface quality, structural and mechanical properties of aluminium castings. Test results may be useful to have the Lost Foam refractory coatings specified together with other process parameters used for the production of castings according to this casting method.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Influence of Mechanical Activation of a Cordierite-Based Filler on Sedimentation Stability of Lost Foam Refractory Coatings",
pages = "25-15",
number = "1",
volume = "51",
doi = "10.2298/SOS1901015P",
url = "conv_864"
}

Pavlović, M., Andrić, L., Radulović, D., Drmanić, S., Đorđević, N.,& Petrov, M.. (2019). Influence of Mechanical Activation of a Cordierite-Based Filler on Sedimentation Stability of Lost Foam Refractory Coatings. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 51(1), 15-25.
https://doi.org/10.2298/SOS1901015P
conv_864

Pavlović M, Andrić L, Radulović D, Drmanić S, Đorđević N, Petrov M. Influence of Mechanical Activation of a Cordierite-Based Filler on Sedimentation Stability of Lost Foam Refractory Coatings. in Science of Sintering. 2019;51(1):15-25.
doi:10.2298/SOS1901015P
conv_864 .

Pavlović, Marko, Andrić, Ljubiša, Radulović, Dragan, Drmanić, Saša, Đorđević, Nataša, Petrov, Milan, "Influence of Mechanical Activation of a Cordierite-Based Filler on Sedimentation Stability of Lost Foam Refractory Coatings" in Science of Sintering, 51, no. 1 (2019):15-25,
https://doi.org/10.2298/SOS1901015P .,
conv_864 .

Radulović, D., Andrić, L., Terzić, A., Petrov, M., Stojanović, J., Trumić, M.,& Trumić, M.. (2018). Dobijanje koncentrata K/Pb i K/Zn tržišnog kvaliteta postupkom gravitacijske koncentracije bogate rude sa povećanim sadržajem metaličnih minerala iz “Pb-Zn” Rudnika Grot. 
Beograd : Institut za tehnologiju nuklearnih i drugih mineralnih sirovina..

Radulović D, Andrić L, Terzić A, Petrov M, Stojanović J, Trumić M, Trumić M. Dobijanje koncentrata K/Pb i K/Zn tržišnog kvaliteta postupkom gravitacijske koncentracije bogate rude sa povećanim sadržajem metaličnih minerala iz “Pb-Zn” Rudnika Grot. 2018;..

Radulović, Dragan, Andrić, Ljubiša, Terzić, Anja, Petrov, Milan, Stojanović, Jovica, Trumić, Milan, Trumić, Maja, "Dobijanje koncentrata K/Pb i K/Zn tržišnog kvaliteta postupkom gravitacijske koncentracije bogate rude sa povećanim sadržajem metaličnih minerala iz “Pb-Zn” Rudnika Grot" (2018).

Radulović, D., Andrić, L., Terzić, A., Stojanović, J., Marković, M.,& Petrov, M.. (2018). Definisanje uslova razdvajanja (separacije), posle mlevenja, u mineralnom sistemu pirofilita-kvarca u zasebne proizvode, ležišta „Parsović“ – Konjic (BiH). 
Beograd : Institut za tehnologiju nuklearnih i drugih mineralnih sirovina..

Radulović D, Andrić L, Terzić A, Stojanović J, Marković M, Petrov M. Definisanje uslova razdvajanja (separacije), posle mlevenja, u mineralnom sistemu pirofilita-kvarca u zasebne proizvode, ležišta „Parsović“ – Konjic (BiH). 2018;..

Radulović, Dragan, Andrić, Ljubiša, Terzić, Anja, Stojanović, Jovica, Marković, Marija, Petrov, Milan, "Definisanje uslova razdvajanja (separacije), posle mlevenja, u mineralnom sistemu pirofilita-kvarca u zasebne proizvode, ležišta „Parsović“ – Konjic (BiH)" (2018).